of: Drop superfluous dependance for OF_OVERLAY

The whole menu already depends on OF, so there is no need to additionaly specify it.
Suggested-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NMatwey V. Kornilov <matwey@sai.msu.ru>
Signed-off-by: NRob Herring <robh@kernel.org>

drivers/of/Kconfig

@@ -85,7 +85,6 @@ config OF_RESOLVE
 
 config OF_OVERLAY
 	bool "Device Tree overlays"
-	depends on OF
 	select OF_DYNAMIC
 	select OF_RESOLVE