silabs minor fixes (project-chip#33121)

Author: jepenven-silabs

examples/platform/silabs/efr32/rs911x/hal/efx_spi.c

@@ -374,7 +374,7 @@ int16_t rsi_spi_transfer(uint8_t * tx_buf, uint8_t * rx_buf, uint16_t xlen, uint
     }
 
     (void) mode; // currently not used;
-    error_t rsiError = RSI_ERROR_NONE;
+    int16_t rsiError = RSI_ERROR_NONE;
 
     xSemaphoreTake(spiTransferLock, portMAX_DELAY);
 

examples/platform/silabs/efr32/uart.cpp

@@ -301,7 +301,7 @@ void USART_IRQHandler(void)
 {
 #ifdef ENABLE_CHIP_SHELL
     chip::NotifyShellProcess();
-#elif !defined(PW_RPC_ENABLED)
+#elif !defined(PW_RPC_ENABLED) && !defined(SL_WIFI)
     otSysEventSignalPending();
 #endif
 

examples/platform/silabs/matter_shell.cpp

@@ -83,13 +83,13 @@ CHIP_ERROR CmdSilabsDispatch(int argc, char ** argv)
         size_t arg_len = strlen(argv[i]);
 
         /* Make sure that the next argument won't overflow the buffer */
-        VerifyOrExit(buff_ptr + arg_len < buff + kMaxLineLength, error = CHIP_ERROR_BUFFER_TOO_SMALL);
+        VerifyOrExit(buff_ptr + arg_len < buff + SL_CLI_INPUT_BUFFER_SIZE, error = CHIP_ERROR_BUFFER_TOO_SMALL);
 
         strncpy(buff_ptr, argv[i], arg_len);
         buff_ptr += arg_len;
 
         /* Make sure that there is enough buffer for a space char */
-        if (buff_ptr + sizeof(char) < buff + kMaxLineLength)
+        if (buff_ptr + sizeof(char) < buff + SL_CLI_INPUT_BUFFER_SIZE)
         {
             strncpy(buff_ptr, " ", sizeof(char));
             buff_ptr++;