package/gst1-libav: fix syntax error

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

package/gstreamer1/gst1-libav/gst1-libav.mk

@@ -83,7 +83,7 @@ else
 GST1_LIBAV_CONF_EXTRA_OPTS += --disable-vfp
 endif
 
-ifeq ($(BR2_POWERPC_CPU_HASH_ALTIVEC),y)
+ifeq ($(BR2_POWERPC_CPU_HAS_ALTIVEC),y)
 GST1_LIBAV_CONF_EXTRA_OPTS += --enable-altivec
 else
 GST1_LIBAV_CONF_EXTRA_OPTS += --disable-altivec