vmcore: it is not experimental any more

We use vmcore in our production kernel for a long time, it is pretty
stable now.  So I don't think we need to mark it as experimental any more.
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/proc/Kconfig

@@ -33,7 +33,7 @@ config PROC_KCORE
 	depends on PROC_FS && MMU
 
 config PROC_VMCORE
-        bool "/proc/vmcore support (EXPERIMENTAL)"
+	bool "/proc/vmcore support"
 	depends on PROC_FS && CRASH_DUMP
 	default y
         help