Revert "configure: reject lavc >= 54.22 because of planar audio"

This reverts commit 8b49a93d.

configure.ac

@@ -2416,8 +2416,8 @@ AC_ARG_ENABLE(avcodec,
 [  --enable-avcodec        libavcodec codec (default enabled)])
 AS_IF([test "${enable_avcodec}" != "no"], [
   PKG_CHECK_MODULES(AVCODEC,[libavcodec >= 52.25.0 libavutil], [
-    PKG_CHECK_EXISTS([libavcodec < 54.22],, [
-      AC_MSG_ERROR([libavcodec versions 54.22 and later are not supported yet.])
+    PKG_CHECK_EXISTS([libavcodec < 55],, [
+      AC_MSG_ERROR([libavcodec versions 55 and later are not supported yet.])
     ])
     VLC_SAVE_FLAGS
     CPPFLAGS="${CPPFLAGS} ${AVCODEC_CFLAGS}"