ARM: PRIMA2: add new SiRFmarco SMP SoC infrastructures

this patch adds tick timer, smp entries and generic DT machine
for SiRFmarco dual-core SMP chips.

with the added marco, we change the defconfig, using the same
defconfig, we get a zImage which can work on both prima2 and
marco.

Signed-off-by: Barry Song <Baohua.Song@csr.com>
Cc: Mark Rutland <mark.rutland@arm.com>
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
index e44da40..6af9901 100644
--- a/arch/arm/boot/dts/Makefile
+++ b/arch/arm/boot/dts/Makefile
@@ -73,6 +73,7 @@
 	kirkwood-ts219-6281.dtb \
 	kirkwood-ts219-6282.dtb \
 	kirkwood-openblocks_a6.dtb
+dtb-$(CONFIG_ARCH_MARCO) += marco-evb.dtb
 dtb-$(CONFIG_ARCH_MSM) += msm8660-surf.dtb \
 	msm8960-cdp.dtb
 dtb-$(CONFIG_ARCH_MVEBU) += armada-370-db.dtb \