wl1251: fix sparse warning

The wl1251 driver was generating the following warning:

drivers/net/wireless/wl1251/boot.c:467:21: warning: incorrect type in assignment (different base types)
drivers/net/wireless/wl1251/boot.c:467:21:    expected unsigned int [unsigned] [assigned] [usertype] val
drivers/net/wireless/wl1251/boot.c:467:21:    got restricted __le32 [usertype] <noident>

Fix this by removing one cpu_to_le32() call in the wrong place.
Signed-off-by: Luciano Coelho <coelho@ti.com>

drivers/net/wireless/wl1251/boot.c

@@ -464,8 +464,6 @@ static int wl1251_boot_upload_nvs(struct wl1251 *wl)
 		val = (nvs_ptr[0] | (nvs_ptr[1] << 8)
 		       | (nvs_ptr[2] << 16) | (nvs_ptr[3] << 24));
 
-		val = cpu_to_le32(val);
-
 		wl1251_debug(DEBUG_BOOT,
 			     "nvs write table 0x%x: 0x%x",
 			     nvs_start, val);