amdfwtool: Pack out-of-bounds check into a function and move

Need to check the FWs number limit several times. So pack the
duplicated steps into a function. And do it before access the new
entry.

Change-Id: I71117d1c817c0b6ddaea4ea47aea91672cc6d55a
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58764
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

0 files changed, 0 insertions, 0 deletions