[ARM] 3307/1: old ABI compat: mark it experimental

Patch from Nicolas Pitre

Although OABI_COMPAT works fine in most cases, it is still experimental
and could be for ever since it is nearly impossible to handle
everything, e.g. ioctls.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Kconfig

@@ -446,7 +446,7 @@ config AEABI
 
 config OABI_COMPAT
 	bool "Allow old ABI binaries to run with this kernel"
-	depends on AEABI
+	depends on AEABI && EXPERIMENTAL
 	default y
 	help
 	  This option preserves the old syscall interface along with the