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The value stored in `gen` is only ever `1` or `0`. Storing `1` causes Clang to warn, since the only valid values for a 1-bit int are -1 and 0: ``` amdfwtool.c:1487:27: error: implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1 [-Werror,-Wsingle-bit-bitfield-constant-conversion] 1487 | amd_romsig->efs_gen.gen = EFS_BEFORE_SECOND_GEN; ``` TEST=Rebuilt coreboot; no warning was emitted. Change-Id: Ibd83be8302e8a717db7e7dc86a403b5648976586 Signed-off-by: George Burgess IV <gbiv@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/83412 Reviewed-by: Felix Held <felix-coreboot@felixheld.de> Reviewed-by: Matt DeVillier <matt.devillier@gmail.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Raul Rangel <rrangel@chromium.org>