clk: mvebu: add Armada 370 SoC-centric clock init

This is moving core clock and clock gating init for Armada 370 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/Kconfig b/drivers/clk/mvebu/Kconfig
index 211695c..1daf61e 100644
--- a/drivers/clk/mvebu/Kconfig
+++ b/drivers/clk/mvebu/Kconfig
@@ -10,6 +10,11 @@
 config MVEBU_CLK_COMMON
 	bool
 
+config ARMADA_370_CLK
+	bool
+	select MVEBU_CLK_COMMON
+	select MVEBU_CLK_CPU
+
 config DOVE_CLK
 	bool
 	select MVEBU_CLK_COMMON