staging:rtl8192u: Rename IsACValid and add parenthesis - Style

The macro IsACValid is renamed to resolve the checkpatch issue with
CamelCase naming. In addition the parameter has parenthesis added to
clear the checkpatch issue with precedence issues.

These changes are coding style changes and as such should have not
impact on runtime code execution.
Signed-off-by: NJohn Whitmore <johnfwhitmore@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/rtl819x_Qos.h

@@ -77,6 +77,6 @@ struct octet_string {
 	u16             length;
 };
 
-#define IsACValid(ac)			((ac <= 7) ? true : false)
+#define is_ac_valid(ac)			(((ac) <= 7) ? true : false)
 
 #endif // #ifndef __INC_QOS_TYPE_H

drivers/staging/rtl8192u/ieee80211/rtl819x_TSProc.c

@@ -309,7 +309,7 @@ bool GetTs(
 		UP = 0;
 	} else {
 		// In WMM case: we use 4 TID only
-		if (!IsACValid(TID)) {
+		if (!is_ac_valid(TID)) {
 			IEEE80211_DEBUG(IEEE80211_DL_ERR, " in %s(), TID(%d) is not valid\n", __func__, TID);
 			return false;
 		}