mmc: rename ARCH_BCM to ARCH_BCM_MOBILE

Currently ARCH_BCM has been used for Broadcom Mobile V7 based SoCs.
In order to allow other Broadcom SoCs to also use mach-bcm directory and
files, this patch renames the original ARCH_BCM to ARCH_BCM_MOBILE, and
uses ARCH_BCM to define any Broadcom chip residing in mach-bcm directory.

Signed-off-by: Christian Daudt <bcm@fixthebug.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Chris Ball <chris@printf.net>
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 82cc34d..8555a7a 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -263,7 +263,7 @@
 
 config MMC_SDHCI_BCM_KONA
 	tristate "SDHCI support on Broadcom KONA platform"
-	depends on ARCH_BCM
+	depends on ARCH_BCM_MOBILE
 	select MMC_SDHCI_PLTFM
 	help
 	  This selects the Broadcom Kona Secure Digital Host Controller