HV: add the missing brackets to loop body

MISRA-C requires the use of brackets, even when there is only one
statement in the loop body.

Signed-off-by: Ying Liu <ying2.liu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/lib/sprintf.c

@@ -469,8 +469,9 @@ int do_print(const char *fmt, struct print_param *param,
 		/* mark the current position and search the next '%' */
 		start = fmt;
 
-		while (((*fmt) != 0) && (*fmt != '%'))
+		while (((*fmt) != 0) && (*fmt != '%')) {
 			fmt++;
+		}
 
 		/*
 		 * pass all characters until the next '%' to the emit function.

hypervisor/lib/string.c

@@ -150,8 +150,9 @@ int atoi(const char *str)
 
 char *strchr(const char *s, int ch)
 {
-	while ((*s != 0) && (*s != ch))
+	while ((*s != 0) && (*s != ch)) {
 		++s;
+	}
 
 	return ((*s) != 0) ? ((char *)s) : 0;
 }

hypervisor/lib/udelay.c

@@ -15,6 +15,6 @@ void udelay(uint32_t us)
 	dest_tsc = rdtsc() + delta_tsc;
 
 	/* Loop until time expired */
-	while
-		(rdtsc() < dest_tsc);
+	while (rdtsc() < dest_tsc) {
+	}
 }