HV: lib: make the argument to udelay unsigned

The parameter to udelay is the microseconds to wait for, which should be an
unsigned integer.

Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

Author: junjiemao1

hypervisor/include/lib/rtl.h

@@ -26,7 +26,7 @@ struct udiv_result {
 };
 
 /* Function prototypes */
-void udelay(int us);
+void udelay(uint32_t us);
 void *memchr(const void *void_s, int c, size_t n);
 void *memmove(void *s1, const void *s2, size_t n);
 int strcmp(const char *s1, const char *s2);

hypervisor/lib/udelay.c

@@ -6,12 +6,12 @@
 
 #include <hv_lib.h>
 
-void udelay(int loop_count)
+void udelay(uint32_t us)
 {
 	uint64_t dest_tsc, delta_tsc;
 
 	/* Calculate number of ticks to wait */
-	delta_tsc = US_TO_TICKS(loop_count);
+	delta_tsc = US_TO_TICKS(us);
 	dest_tsc = rdtsc() + delta_tsc;
 
 	/* Loop until time expired */