Microcode: add dependency to header files

When using microcode header and updating the header (due to a new
release of microcode during early development) the build system
doesn't detect the header change. This commit fixes this by adding
the appropriate dependency.

Change-Id: I4211a3e39f67da727ef7cddbbee6d8c4718dee4a
Signed-off-by: Julien Viard de Galbert <jviarddegalbert@online.net>
Reviewed-on: https://review.coreboot.org/22307
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed