ARM: 5957/1: ARM: RealView SD/MMC Card detection and write-protect using GPIOLIB

The switch to using GPIOLIB broke the sd/mmc card detection on the
RealView development boards if GPIO_PL061 was not selected.
This patch selects GPIO_PL061 if GPIOLIB is selected.
The sense of the return value from mmc_status has also changed
and is corrected.
Signed-off-by: NColin Tuckley <colin.tuckley@arm.com>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -253,6 +253,7 @@ config ARCH_REALVIEW
 	select GENERIC_TIME
 	select GENERIC_CLOCKEVENTS
 	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select GPIO_PL061 if GPIOLIB
 	help
 	  This enables support for ARM Ltd RealView boards.
 

arch/arm/mach-realview/core.c

@@ -254,7 +254,7 @@ static unsigned int realview_mmc_status(struct device *dev)
 	else
 		mask = 2;
 
-	return readl(REALVIEW_SYSMCI) & mask;
+	return !(readl(REALVIEW_SYSMCI) & mask);
 }
 
 struct mmci_platform_data realview_mmc0_plat_data = {