brcm80211: fmac: abstract bus_init interface function pointer

Abstract bus layer brcmf_bus_init function pointer for common
layer. This patch is part of the fullmac bus interface refactoring.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Reviewed-by: Alwin Beukers <alwin@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/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
index 7817ede..5089b64 100644
--- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
+++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c
@@ -3423,7 +3423,7 @@
 	return ret;
 }
 
-int brcmf_sdbrcm_bus_init(struct device *dev)
+static int brcmf_sdbrcm_bus_init(struct device *dev)
 {
 	struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 	struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv;
@@ -3954,6 +3954,7 @@
 
 	/* Assign bus interface call back */
 	bus->sdiodev->bus_if->brcmf_bus_stop = brcmf_sdbrcm_bus_stop;
+	bus->sdiodev->bus_if->brcmf_bus_init = brcmf_sdbrcm_bus_init;
 	/* Attach to the brcmf/OS/network interface */
 	ret = brcmf_attach(SDPCM_RESERVE, bus->sdiodev->dev);
 	if (ret != 0) {