brcm80211: fmac: add USB support for bcm43235/6/8 chipsets

This patch extends the use of the brcmfmac driver with support for
chipsets with a USB host interface. The first chipsets supported are
the bcm43235, bcm43236, and bcm43238 for which firmware has been
submitted.

This driver change has been successfully built for x86, x86_64,
ppc64, arm_le, and mips_be.

It has been tested successfully on x86 and x86_64.

Cc: M. Lambert <lambertm@westman.wave.ca>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Kan Yan <kanyan@broadcom.com>
Reviewed-by: Alwin Beukers <alwin@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/brcm80211/Kconfig b/drivers/net/wireless/brcm80211/Kconfig
index cd6375d..c510453 100644
--- a/drivers/net/wireless/brcm80211/Kconfig
+++ b/drivers/net/wireless/brcm80211/Kconfig
@@ -26,16 +26,25 @@
 	  it'll be called brcmfmac.ko.
 
 config BRCMFMAC_SDIO
-	bool "SDIO bus interface support for FullMAC"
+	bool "SDIO bus interface support for FullMAC driver"
 	depends on MMC
 	depends on BRCMFMAC
 	select FW_LOADER
 	default y
 	---help---
 	  This option enables the SDIO bus interface support for Broadcom
-	  FullMAC WLAN driver.
-	  Say Y if you want to use brcmfmac for a compatible SDIO interface
-	  wireless card.
+	  IEEE802.11n embedded FullMAC WLAN driver. Say Y if you want to
+	  use the driver for a SDIO wireless card.
+
+config BRCMFMAC_USB
+	bool "USB bus interface support for FullMAC driver"
+	depends on USB
+	depends on BRCMFMAC
+	select FW_LOADER
+	---help---
+	  This option enables the USB bus interface support for Broadcom
+	  IEEE802.11n embedded FullMAC WLAN driver. Say Y if you want to
+	  use the driver for an USB wireless card.
 
 config BRCMDBG
 	bool "Broadcom driver debug functions"