[coreboot-gerrit] Change in coreboot[master]: amdfwtool: Use a variable to get the return value of write

[Felix Held (Code Review)]

Felix Held has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/45812 )

Change subject: amdfwtool: Use a variable to get the return value of write
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Patch Set 1: Code-Review+1

please move this patch before "amdfwtool: Clean up the Makefile of amdfwtool", so that the issue this patch fixes is already fixed when the makefile change adds some more warning and error compiler switches. the patch itself is good