cpu/intel: Add int to unsigned

Fix the following warning detected by checkpatch.pl:

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

TEST=Build and run on Galileo Gen2

Change-Id: I207713a3370e5a9abed4535187aa2aaeef502d6f
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18848
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/cpu/intel/haswell/finalize.c

@@ -26,7 +26,7 @@
  * Revision 1.6.0, June 2012 */
 
 #if 0
-static void msr_set_bit(unsigned reg, unsigned bit)
+static void msr_set_bit(unsigned int reg, unsigned int bit)
 {
 	msr_t msr = rdmsr(reg);