fby35: enhance kcs error handling #3837

Job	Run time
run-clang-format	12s
run-cppcheck	13s
Build-Platforms (yv3-vf)	2m 7s
Build-Platforms (at-cb)	2m 5s
Build-Platforms (wc-mb)	2m 14s
Build-Platforms (at-mc)	2m 5s
Build-Platforms (gt-cc)	2m 28s
Build-Platforms (yv35-hd)	2m 23s
Build-Platforms (yv35-cl)	2m 13s
Build-Platforms (yv35-bb)	2m 39s
Build-Platforms (yv3-dl)	2m 7s
Build-Platforms (nuvoton-sb-rb)	2m 10s
Build-Platforms (yv35-gl)	2m 7s
Build-Platforms (yv4-sd)	2m 38s
Build-Platforms (nuvoton-sb-si)	2m 29s
Build-Platforms (yv4-wf)	2m 28s
Build-Platforms (yv35-ji)	2m 22s
Build-Platforms (yv35-rf)	2m 19s
Build-Platforms (yv4-ff)	2m 36s
Aggregate-Lint-Output	6s
	40m 1s

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