package/sdl2: enable 3DNOW only if it's supported by the target

Signed-off-by: Nicolas Robin <nrosfs@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit fe29913fa96d2265ecf91e259f334dbdd67f92fb)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/sdl2/sdl2.mk

@@ -36,6 +36,12 @@ else
 SDL2_CONF_OPTS += --disable-sse
 endif
 
+ifeq ($(BR2_X86_CPU_HAS_3DNOW),y)
+SDL2_CONF_OPTS += --enable-3dnow
+else
+SDL2_CONF_OPTS += --disable-3dnow
+endif
+
 ifeq ($(BR2_PACKAGE_SDL2_DIRECTFB),y)
 SDL2_DEPENDENCIES += directfb
 SDL2_CONF_OPTS += --enable-video-directfb