1)Added guide for OTA update for psoc6 with trust m

Author: ying-css

docs/guides/infineon_psoc6_trustm_software_update.md

@@ -0,0 +1,71 @@
+# Matter Software Update with Infineon PSoC6 and OPTIGA™ Trust M example applications
+
+The Over The Air (OTA) Software Update functionality can be added to any of the Infineon PSoC6 example applications by passing the
+`chip_enable_ota_requestor=true` option to the build script.
+
+## Running the OTA Download scenario
+
+-   An OTA Provider is a node that can respond to the OTA Requestors' queries about available software updates and share the update packages with them. An OTA Requestor is any node that needs to be updated and can communicate with the OTA Provider to fetch applicable software updates. In the procedure described below, the OTA Provider will be a Linux application and the example running on the Infineon PSoC6 board will work as the OTA Requestor.
+  
+-   On a Linux or Darwin platform build the chip-tool and the ota-provider-app as follows:
+    
+    This step can be ignored if Test Harness(Raspberry Pi) is used as OTA Provider.
+    
+           ```
+           scripts/examples/gn_build_example.sh examples/chip-tool out/
+           scripts/examples/gn_build_example.sh examples/ota-provider-app/linux out/debug chip_config_network_layer_ble=false
+           ```
+    
+- Build the PSoC6 OTA Requestor application with OPTIGA™ Trust M from the connectedhomeip root dir:
+
+         ```
+         $ scripts/build/build_examples.py --enable-flashbundle --target infineon-psoc6-lock-trustm-ota build
+         $ third_party/infineon/psoc6/psoc6_sdk/ota/ota_base_build.sh out/infineon-psoc6-lock-trustm-ota chip-psoc6-lock-example
+         ```
+
+     Note: In order for the Provider to successfully serve the image to a device during the OTA Software Update process the softwareVersion parameter in the Provider config file must be greater than the CHIP_DEVICE_CONFIG_DEVICE_SOFTWARE_VERSION parameter set in the application's CHIPProjectConfig.h file.
+
+* Build the PSoC6 OTA Update application with OPTIGA™ Trust M from the connectedhomeip root dir and create OTA file
+
+      ```
+      $ scripts/build/build_examples.py --enable-flashbundle --no-log-timestamps --target infineon-psoc6-lock-trustm-ota-updateimage build
+      $ third_party/infineon/psoc6/psoc6_sdk/ota/ota_update_build.sh out/infineon-psoc6-lock-trustm-ota-updateimage chip-psoc6-lock-example
+      ```
+
+* Additionally a pre-compiled bootloader must be flashed to the board using [Cypress Programmer](https://softwaretools.infineon.com/tools/com.ifx.tb.tool.cypressprogrammer).
+    This image can be found at:
+
+          $ ./third_party/infineon/psoc6/psoc6_sdk/ota/matter-psoc6-mcuboot-bootloader.hex
+
+* In a terminal start the Provider app passing to it the path to the Matter
+    OTA file created in the previous step:(output of ota_update_build step)
+
+           ```
+           rm -r /tmp/chip_*
+           ./chip-ota-provider-app --discriminator 3840 --passcode 20202021 -f ../chip-psoc6-lock-example.ota
+           ```
+
+* In a separate terminal run the chip-tool commands to provision the Provider:
+
+         ```
+         ./chip-tool pairing onnetwork-long 1 20202021 3840
+         ./chip-tool accesscontrol write acl '[{"fabricIndex": 1, "privilege": 5, "authMode": 2, "subjects": [112233], "targets": null}, {"fabricIndex": 1, "privilege": 3, "authMode": 2, "subjects": null, "targets": null}]' 1 0
+         ```
+
+     Note: If the application device had been previously commissioned press USER Button2 to factory-reset the device.
+
+* In the chip-tool terminal enter:
+
+           ```
+           ./chip-tool pairing ble-wifi 2 <WIFI_SSID> <WIFI_PASSWORD> 20202021 3840
+           ```
+
+* Once the commissioning process completes enter:
+
+           ```
+           ./chip-tool otasoftwareupdaterequestor announce-ota-provider 1 0 0 0 2 0
+           ```
+
+* The application device will connect to the Provider and start the image download. Status of the transfer can be monitored in the OTA Provider
+    terminal. Once the image is downloaded the device will reboot into the downloaded image.
+