ARM: SMP: drop experimental status

SMP on ARM has been around for a while now, without any major issues
being raised.  So, drop the experimental status of this feature.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 377a7a5..ac19a5a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1318,8 +1318,7 @@
 source "kernel/time/Kconfig"
 
 config SMP
-	bool "Symmetric Multi-Processing (EXPERIMENTAL)"
-	depends on EXPERIMENTAL
+	bool "Symmetric Multi-Processing"
 	depends on CPU_V6K || CPU_V7
 	depends on GENERIC_CLOCKEVENTS
 	depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \