mwifiex: remove unnecessary variable initialization

Skip initialization of local variables with some default values
if the values are not going to be used further down the code path.

Signed-off-by: Yogesh Ashok Powar <yogeshp@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c
index c009370..faa09e3 100644
--- a/drivers/net/wireless/mwifiex/wmm.c
+++ b/drivers/net/wireless/mwifiex/wmm.c
@@ -799,7 +799,7 @@
 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
 					const struct sk_buff *skb)
 {
-	u8 ret_val = 0;
+	u8 ret_val;
 	struct timeval out_tstamp, in_tstamp;
 	u32 queue_delay;