staging: rtl8712: Coding style: Fix missing spaces

* Add missing spaces around bitwise OR operation in order to get
  rid of checkpatch.pl's "CHECK: spaces preferred around that '|'"
Signed-off-by: Michael Hornung <mhornung.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/ieee80211.h

@@ -695,7 +695,7 @@ enum ieee80211_state {
 #define IEEE_A            BIT(0)
 #define IEEE_B            BIT(1)
 #define IEEE_G            BIT(2)
-#define IEEE_MODE_MASK    (IEEE_A|IEEE_B|IEEE_G)
+#define IEEE_MODE_MASK    (IEEE_A | IEEE_B | IEEE_G)
 
 static inline int ieee80211_is_empty_essid(const char *essid, int essid_len)
 {