armv7: Move L2CTLR read/write to common

L2CTLR read/write functions are common to armv7 so, move
them in to include/asm/armv7.h and use them where ever it need.

Cc: Tom Warren <twarren@nvidia.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[Backed out the change to arch/arm/mach-tegra/cache.c:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

arch/arm/include/asm/armv7.h

@@ -61,6 +61,27 @@
 #include <asm/io.h>
 #include <asm/barriers.h>
 
+/* read L2 control register (L2CTLR) */
+static inline uint32_t read_l2ctlr(void)
+{
+	uint32_t val = 0;
+
+	asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val));
+
+	return val;
+}
+
+/* write L2 control register (L2CTLR) */
+static inline void write_l2ctlr(uint32_t val)
+{
+	/*
+	 * Note: L2CTLR can only be written when the L2 memory system
+	 * is idle, ie before the MMU is enabled.
+	 */
+	asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory");
+	isb();
+}
+
 /*
  * Workaround for ARM errata # 798870
  * Set L2ACTLR[7] to reissue any memory transaction in the L2 that has been

arch/arm/mach-rockchip/rk3288-board-spl.c

@@ -13,6 +13,7 @@
 #include <malloc.h>
 #include <ram.h>
 #include <spl.h>
+#include <asm/armv7.h>
 #include <asm/gpio.h>
 #include <asm/io.h>
 #include <asm/arch/bootrom.h>
@@ -80,27 +81,6 @@ u32 spl_boot_mode(const u32 boot_device)
 	return MMCSD_MODE_RAW;
 }
 
-/* read L2 control register (L2CTLR) */
-static inline uint32_t read_l2ctlr(void)
-{
-	uint32_t val = 0;
-
-	asm volatile ("mrc p15, 1, %0, c9, c0, 2" : "=r" (val));
-
-	return val;
-}
-
-/* write L2 control register (L2CTLR) */
-static inline void write_l2ctlr(uint32_t val)
-{
-	/*
-	 * Note: L2CTLR can only be written when the L2 memory system
-	 * is idle, ie before the MMU is enabled.
-	 */
-	asm volatile("mcr p15, 1, %0, c9, c0, 2" : : "r" (val) : "memory");
-	isb();
-}
-
 static void configure_l2ctlr(void)
 {
 	uint32_t l2ctlr;