staging: rtl8188eu: change array type to u8

The the last two parameters of write_cam() have type u8.
Change the type of the passed arrays from unsigned char to u8.
Clears a line over 80 characters checkpatch warning.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_wlan_util.c

@@ -454,9 +454,9 @@ void write_cam(struct adapter *padapter, u8 entry, u16 ctrl, u8 *mac, u8 *key)
 
 void clear_cam_entry(struct adapter *padapter, u8 entry)
 {
-	unsigned char null_sta[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
-	unsigned char null_key[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-				    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+	u8 null_sta[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+	u8 null_key[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 
 	write_cam(padapter, entry, 0, null_sta, null_key);
 }