tfm: Enable TFM_EXCEPTION_INFO_DUMP by default

Exception info dump is a very basic feature so it should IMHO be
enabled by default.

For instance, a simple null-pointer exception in the non-secure app
will not be logged unless this option is enabled.

Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>

Author: SebastianBoe

modules/trusted-firmware-m/Kconfig.tfm

@@ -431,6 +431,7 @@ endchoice
 
 config TFM_EXCEPTION_INFO_DUMP
 	bool "TF-M exception info dump"
+	default y
 	help
 	  On fatal errors in the secure firmware, capture info about the exception.
 	  Print the info if the SPM log level is sufficient.