ARM: tegra20: Add Tegra Memory Controller(MC) driver

Tegra Memory Controller(MC) driver for Tegra20
Added to support MC General interrupts, mainly for IOMMU(GART).

Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig
index e0b3156..ebade16 100644
--- a/drivers/memory/Kconfig
+++ b/drivers/memory/Kconfig
@@ -20,4 +20,8 @@
 	  parameters and other settings during frequency, voltage and
 	  temperature changes
 
+config TEGRA20_MC
+	bool
+	depends on ARCH_TEGRA_2x_SOC
+
 endif