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>
diff --git a/src/cpu/intel/haswell/haswell_init.c b/src/cpu/intel/haswell/haswell_init.c
index ba6d83b..89869e4 100644
--- a/src/cpu/intel/haswell/haswell_init.c
+++ b/src/cpu/intel/haswell/haswell_init.c
@@ -414,8 +414,8 @@
 {
 	msr_t msr = rdmsr(MSR_PLATFORM_INFO);
 	msr_t limit;
-	unsigned power_unit;
-	unsigned tdp, min_power, max_power, max_time;
+	unsigned int power_unit;
+	unsigned int tdp, min_power, max_power, max_time;
 	u8 power_limit_1_val;
 
 	if (power_limit_1_time >= ARRAY_SIZE(power_limit_time_sec_to_msr))