hv:clear up the usage of printf data struct

The printf related functions have been called by other various
functions, e.g. get_ptdev_info(), get_ioapic_info, etc. The patch
is used to clear up the usage.

Tracked-On: #861
Signed-off-by: Junjun Shan <junjun.shan@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

hypervisor/lib/sprintf.c

@@ -653,7 +653,7 @@ size_t snprintf(char *dest, size_t sz, const char *fmt, ...)
 	va_start(args, fmt);
 
 	/* execute the printf() */
-	res = vsnprintf(dest, (size_t)sz, fmt, args);
+	res = vsnprintf(dest, sz, fmt, args);
 
 	/* destroy parameter list */
 	va_end(args);