ARM: Fix Versatile/Realview/VExpress MMC card detection sense

The MMC card detection sense has become really confused with negations
at various levels, leading to some platforms not detecting inserted
cards.  Fix this by converting everything to positive logic throughout,
thereby getting rid of these negations.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index d250711..c842397 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -241,7 +241,7 @@
 
 static unsigned int v2m_mmci_status(struct device *dev)
 {
-	return !(readl(MMIO_P2V(V2M_SYS_MCI)) & (1 << 0));
+	return readl(MMIO_P2V(V2M_SYS_MCI)) & (1 << 0);
 }
 
 static struct mmci_platform_data v2m_mmci_data = {