ath9k: Remove a few unnecessary macros

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/xmit.c b/drivers/net/wireless/ath9k/xmit.c
index 47cf9f3..a24a3a5 100644
--- a/drivers/net/wireless/ath9k/xmit.c
+++ b/drivers/net/wireless/ath9k/xmit.c
@@ -2174,7 +2174,7 @@
 
 		/* Setup tx descriptors */
 		error = ath_descdma_setup(sc, &sc->sc_txdma, &sc->sc_txbuf,
-			"tx", nbufs * ATH_FRAG_PER_MSDU, 1);
+			"tx", nbufs, 1);
 		if (error != 0) {
 			DPRINTF(sc, ATH_DBG_FATAL,
 				"%s: failed to allocate tx descriptors: %d\n",