[ARM] mmp: add support for Marvell MMP2

Marvell MMP2 (aka ARMADA610) is a SoC based on PJ4 core. It's
ARMv6 compatible.  Support basic interrupt handler and timer,
and basic support for MMP2 based FLINT platform.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 8312731..f34d462 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -497,7 +497,7 @@
 	  Orion-2 (5281), Orion-1-90 (6183).
 
 config ARCH_MMP
-	bool "Marvell PXA168/910"
+	bool "Marvell PXA168/910/MMP2"
 	depends on MMU
 	select GENERIC_GPIO
 	select ARCH_REQUIRE_GPIOLIB
@@ -508,7 +508,7 @@
 	select TICK_ONESHOT
 	select PLAT_PXA
 	help
-	  Support for Marvell's PXA168/910 processor line.
+	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
 
 config ARCH_KS8695
 	bool "Micrel/Kendin KS8695"