ARM: drop experimental status for ARM_PATCH_PHYS_VIRT

This has now been well tested, and several platforms are now selecting
this directly.  It's time to drop its experimental status.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -195,8 +195,7 @@ config VECTORS_BASE
 	  The base address of exception vectors.
 
 config ARM_PATCH_PHYS_VIRT
-	bool "Patch physical to virtual translations at runtime (EXPERIMENTAL)"
-	depends on EXPERIMENTAL
+	bool "Patch physical to virtual translations at runtime"
 	depends on !XIP_KERNEL && MMU
 	depends on !ARCH_REALVIEW || !SPARSEMEM
 	help