clk: mvebu: add Armada XP SoC-centric clock init

This is moving core clock and clock gating init for Armada XP to
its own file and adds a Kconfig option. Also init functions are added
and declared so they get called on of_clk_init.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
diff --git a/drivers/clk/mvebu/Makefile b/drivers/clk/mvebu/Makefile
index 367b72c..13f3d22 100644
--- a/drivers/clk/mvebu/Makefile
+++ b/drivers/clk/mvebu/Makefile
@@ -4,5 +4,6 @@
 obj-$(CONFIG_MVEBU_CLK_GATING) 	+= clk-gating-ctrl.o
 
 obj-$(CONFIG_ARMADA_370_CLK)	+= armada-370.o
+obj-$(CONFIG_ARMADA_XP_CLK)	+= armada-xp.o
 obj-$(CONFIG_DOVE_CLK)		+= dove.o
 obj-$(CONFIG_KIRKWOOD_CLK)	+= kirkwood.o