brcmsmac: fix DMA on SoCs

These extra offsets are only needed by PCIe devices and not when
running on an SoC.

This partly reverts commit:
commit 821e4e9317
Author: Roland Vossen <rvossen@broadcom.com>
Date:   Mon Aug 8 15:58:58 2011 +0200

    staging: brcm80211: removed unused bus code from softmac

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/brcm80211/brcmsmac/dma.c

@@ -573,6 +573,7 @@ struct dma_pub *dma_attach(char *name, struct si_pub *sih,
 	struct dma_info *di;
 	u8 rev = core->id.rev;
 	uint size;
+	struct si_info *sii = container_of(sih, struct si_info, pub);
 
 	/* allocate private info structure */
 	di = kzalloc(sizeof(struct dma_info), GFP_ATOMIC);
@@ -633,11 +634,15 @@ struct dma_pub *dma_attach(char *name, struct si_pub *sih,
 	 */
 	di->ddoffsetlow = 0;
 	di->dataoffsetlow = 0;
-	/* add offset for pcie with DMA64 bus */
-	di->ddoffsetlow = 0;
-	di->ddoffsethigh = SI_PCIE_DMA_H32;
+	/* for pci bus, add offset */
+	if (sii->icbus->hosttype == BCMA_HOSTTYPE_PCI) {
+		/* add offset for pcie with DMA64 bus */
+		di->ddoffsetlow = 0;
+		di->ddoffsethigh = SI_PCIE_DMA_H32;
+	}
 	di->dataoffsetlow = di->ddoffsetlow;
 	di->dataoffsethigh = di->ddoffsethigh;
+
 	/* WAR64450 : DMACtl.Addr ext fields are not supported in SDIOD core. */
 	if ((core->id.id == BCMA_CORE_SDIO_DEV)
 	    && ((rev > 0) && (rev <= 2)))