staging: rtl8723bs: add space after enum declaration

Add space between "enum TXDESC_SC" and '{' at line 86.

Fix the following error from checkpatch.pl

WARNING: missing space after enum definition
+enum TXDESC_SC{
Signed-off-by: William Tustumi <whatust@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/include/rtw_xmit.h

@@ -83,7 +83,7 @@ do{\
 
 #define TXDESC_OFFSET TXDESC_SIZE
 
-enum TXDESC_SC{
+enum TXDESC_SC {
 	SC_DONT_CARE = 0x00,
 	SC_UPPER = 0x01,
 	SC_LOWER = 0x02,