libmediaart: fix qt5 build

Use BR2_PACKAGE_QT5_VERSION_LATEST instead of BR2_QT5_VERSION_LATEST

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libmediaart/libmediaart.mk

@@ -22,7 +22,7 @@ LIBMEDIAART_CONF_OPTS += \
 	--disable-qt
 else ifeq ($(BR2_PACKAGE_MEDIAART_BACKEND_QT),y)
 # qt5 needs c++11 (since qt-5.7)
-ifeq ($(BR2_QT5_VERSION_LATEST),y)
+ifeq ($(BR2_PACKAGE_QT5_VERSION_LATEST),y)
 LIBMEDIAART_CONF_ENV += CXXFLAGS="$(TARGET_CXXFLAGS) -std=c++11"
 endif
 LIBMEDIAART_DEPENDENCIES += \