src/lib: Add "int" following "unsigned"

Fix the following warning detected by checkpatch.pl:

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

The remaining 37 warnings in gcov-io.c and libgcov.c are all false
positives generated by checkpatch detecting a symbol or function name
ending in _unsigned.

TEST=Build and run on Galileo Gen2

Change-Id: I9f1b71993caca8b3eb3f643525534a937d365ab3
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18695
Tested-by: build bot (Jenkins)
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/lib/delay.c

@@ -1,14 +1,14 @@
 #include <delay.h>
-void mdelay(unsigned msecs)
+void mdelay(unsigned int msecs)
 {
-	unsigned i;
+	unsigned int i;
 	for(i = 0; i < msecs; i++) {
 		udelay(1000);
 	}
 }
-void delay(unsigned secs)
+void delay(unsigned int secs)
 {
-	unsigned i;
+	unsigned int i;
 	for(i = 0; i < secs; i++) {
 		mdelay(1000);
 	}