arm: zynq: Move slcr initialization to separate file

Create separate slcr driver instead of polluting common code.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/mach-zynq/Makefile b/arch/arm/mach-zynq/Makefile
index 320faed..13ee09b 100644
--- a/arch/arm/mach-zynq/Makefile
+++ b/arch/arm/mach-zynq/Makefile
@@ -3,4 +3,4 @@
 #
 
 # Common support
-obj-y				:= common.o
+obj-y				:= common.o slcr.o