rt2x00: rt2800: unify [RT]XWI_SIZE defines

Use common names instead of chip specific ones.
The patch contains no functional changes, but
it makes it easier to add support for further
descriptor sizes.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2800usb.c b/drivers/net/wireless/rt2x00/rt2800usb.c
index 7edd903..840833b 100644
--- a/drivers/net/wireless/rt2x00/rt2800usb.c
+++ b/drivers/net/wireless/rt2x00/rt2800usb.c
@@ -855,11 +855,11 @@
 	unsigned short txwi_size, rxwi_size;
 
 	if (rt2x00_rt(rt2x00dev, RT5592)) {
-		txwi_size = TXWI_DESC_SIZE_5592;
-		rxwi_size = RXWI_DESC_SIZE_5592;
+		txwi_size = TXWI_DESC_SIZE_5WORDS;
+		rxwi_size = RXWI_DESC_SIZE_6WORDS;
 	} else {
-		txwi_size = TXWI_DESC_SIZE;
-		rxwi_size = RXWI_DESC_SIZE;
+		txwi_size = TXWI_DESC_SIZE_4WORDS;
+		rxwi_size = RXWI_DESC_SIZE_4WORDS;
 	}
 
 	switch (queue->qid) {