[media] siano: replace sms_warn() by pr_warn()

There's no reason for a sms' own sms_warn macro. Just replace
it by the standard pr_warn().

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/common/siano/smscoreapi.h

@@ -1181,7 +1181,6 @@ int smscore_led_state(struct smscore_device_t *core, int led);
 
 #define sms_log(fmt, arg...) pr_info(fmt "\n", ##arg)
 #define sms_err(fmt, arg...) pr_err(fmt " on line: %d\n", ##arg, __LINE__)
-#define sms_warn(fmt, arg...) pr_warn(fmt "\n", ##arg)
 #define sms_info(fmt, arg...) do {\
 	if (sms_dbg & DBG_INFO) \
 		pr_info(fmt "\n", ##arg); \