avutil: delay removial of FF_API_GET_CHANNEL_LAYOUT_COMPAT

avoids fate failure of join filter
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/version.h

@@ -123,7 +123,7 @@
 #define FF_API_VDPAU                    (LIBAVUTIL_VERSION_MAJOR < 55)
 #endif
 #ifndef FF_API_GET_CHANNEL_LAYOUT_COMPAT
-#define FF_API_GET_CHANNEL_LAYOUT_COMPAT (LIBAVUTIL_VERSION_MAJOR < 54)
+#define FF_API_GET_CHANNEL_LAYOUT_COMPAT (LIBAVUTIL_VERSION_MAJOR < 55)
 #endif
 #ifndef FF_API_OLD_OPENCL
 #define FF_API_OLD_OPENCL               (LIBAVUTIL_VERSION_MAJOR < 54)