qemu: Fixup target sdl configuration to use PACKAGECONFIG

SDL is now controlled by PACKAGECONFIG, remove the DEPENDS remnant set PACKAGECONFIG accordingly.

b/meta/recipes-devtools/qemu/qemu.inc
index 8e2a9b2..0c89e0b 100644

@@ -1,7 +1,7 @@
 SUMMARY = "Fast open source processor emulator"
 HOMEPAGE = "http://qemu.org"
 LICENSE = "GPLv2 & LGPLv2.1"
-DEPENDS = "glib-2.0 zlib alsa-lib pixman libsdl \
+DEPENDS = "glib-2.0 zlib alsa-lib pixman \
            ${@bb.utils.contains('DISTRO_FEATURES', 'x11',

'virtual/libx11', '', d)}"
DEPENDS_class-native = "zlib-native alsa-lib-native glib-2.0-native
pixman-native dtc-native"
DEPENDS_class-nativesdk = "nativesdk-zlib nativesdk-libsdl
nativesdk-glib-2.0 nativesdk-pixman nativesdk-dtc"
@@ -79,7 +79,7 @@ do_install_append() {
}
# END of qemu-mips workaround

-PACKAGECONFIG ??= "fdt"
+PACKAGECONFIG ??= "fdt sdl"
PACKAGECONFIG[virtfs] = "--enable-virtfs
--enable-attr,--disable-virtfs,libcap attr,"
PACKAGECONFIG[aio] = "--enable-linux-aio,--disable-linux-aio,libaio," PACKAGECONFIG[xfs] = "--enable-xfsctl,--disable-xfsctl,xfsprogs,"