linknx: needs mmu

Inherited from libpthsem which uses fork()

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/linknx/Config.in

@@ -2,6 +2,7 @@ config BR2_PACKAGE_LINKNX
 	bool "linknx"
 	select BR2_PACKAGE_LIBPTHSEM
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_MMU # libpthsem
 	help
 	  Linknx is an automation platform providing high level functionalities
 	  to EIB/KNX installation.