brcm80211: smac: use bcma core control functions

BCMA provides functions to control the state of the cores so
using that and remove similar implementation from the driver.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Alwin Beukers <alwin@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/dma.c b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
index dfcd9cf..dab04bb 100644
--- a/drivers/net/wireless/brcm80211/brcmsmac/dma.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/dma.c
@@ -581,7 +581,8 @@
 	di->msg_level = msg_level ? msg_level : &dma_msg_level;
 
 
-	di->dma64 = ((ai_core_sflags(sih, 0, 0) & SISF_DMA64) == SISF_DMA64);
+	di->dma64 =
+		((bcma_aread32(d11core, BCMA_IOST) & SISF_DMA64) == SISF_DMA64);
 
 	/* init dma reg info */
 	di->d11core = d11core;