ARM: 7531/1: mark kernelmode mem{cpy,set} non-experimental

This feature was added in 2009, I've been using it off and on and
never had any problems with it on my systems. I cannot see why
it needs to be marked experimental, make it a normal feature and
let us discover its possible shortcomings as people try to turn
it on instead.

Cc: Lennert Buytenhek <kernel@wantstofly.org>
Cc: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -1855,8 +1855,8 @@ config ALIGNMENT_TRAP
 	  configuration it is safe to say N, otherwise say Y.
 
 config UACCESS_WITH_MEMCPY
-	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
-	depends on MMU && EXPERIMENTAL
+	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
+	depends on MMU
 	default y if CPU_FEROCEON
 	help
 	  Implement faster copy_to_user and clear_user methods for CPU