staging: rtl8192e: rename charData to char_data in ba_param_set union

Fixes a checkpatch CHECK message.
Signed-off-by: William Durand <will+git@drnd.me>
Link: https://lore.kernel.org/r/20210219101206.18036-2-will+git@drnd.meSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl819x_BA.h

@@ -28,7 +28,7 @@ union sequence_control {
 };
 
 union ba_param_set {
-	u8 charData[2];
+	u8 char_data[2];
 	u16 shortData;
 	struct {
 		u16 AMSDU_Support:1;