util/amdfwtool: Add generic image copy function

Consolidate the code that opens, stats, copies, and closes the
individual files into a single function.

TEST=Verify no difference in amdfw.rom for google/grunt before
     and after the patch is applied

Change-Id: I2da0dd79186ccc8c762b58cf3decb9980378a5f7
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31733
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

0 files changed, 0 insertions, 0 deletions