staging:rtl8192u: Add spaces around '+' operator - Style

Add spaces around '+' operator as required by the coding standard.
This clears the checkpatch issue.

This change is purely coding style in nature and should have not
effect on runtime code execution.
Signed-off-by: John Whitmore <johnfwhitmore@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/dot11d.h

@@ -24,8 +24,8 @@ struct rt_dot11d_info {
 	u8  country_ie_src_addr[6]; /* Source AP of the country IE. */
 	u8  country_ie_watchdog;
 
-	u8  channel_map[MAX_CHANNEL_NUMBER+1];  /* !Value 0: Invalid, 1: Valid (active scan), 2: Valid (passive scan) */
-	u8  max_tx_pwr_dbm_list[MAX_CHANNEL_NUMBER+1];
+	u8  channel_map[MAX_CHANNEL_NUMBER + 1];  /* !Value 0: Invalid, 1: Valid (active scan), 2: Valid (passive scan) */
+	u8  max_tx_pwr_dbm_list[MAX_CHANNEL_NUMBER + 1];
 
 	enum dot11d_state state;
 };