soc/intel/broadwell: Add int to unsigned

Fix the following issue detected by checkpatch:

WARNING: Prefer 'unsigned int' to bare use of 'unsigned'

TEST=None

Change-Id: Iae22e724b6adae16248db7dc8f822f65bfadae5f
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18873
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
15 files changed