ARM: zynq: Make zynq_slcr_base static

The pointer doesn't need to be passed around any more.
Make it static.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/arm/mach-zynq/slcr.c b/arch/arm/mach-zynq/slcr.c
index db5cb31..34c1c2a 100644
--- a/arch/arm/mach-zynq/slcr.c
+++ b/arch/arm/mach-zynq/slcr.c
@@ -31,7 +31,7 @@
 #define SLCR_A9_CPU_CLKSTOP		0x10
 #define SLCR_A9_CPU_RST			0x1
 
-void __iomem *zynq_slcr_base;
+static void __iomem *zynq_slcr_base;
 static struct regmap *zynq_slcr_regmap;
 
 /**