python3: uses fork(), only available on MMU platforms

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/python3/Config.in

@@ -1,6 +1,8 @@
 config BR2_PACKAGE_PYTHON3
 	bool "python3"
 	depends on BR2_USE_WCHAR
+	# uses fork()
+	depends on BR2_USE_MMU
 	select BR2_PACKAGE_LIBFFI
 	help
 	  The python language interpreter.