xine-lib: Spell --with-libaom correctly

Closes: https://trac.macports.org/ticket/71550

multimedia/xine-lib/Portfile

@@ -24,8 +24,8 @@ use_xz              yes
 depends_build       port:automake \
                     port:libtool \
                     port:optipng \
-                    port:xmlto \
-                    port:pkgconfig
+                    path:bin/pkg-config:pkgconfig \
+                    port:xmlto
 
 depends_lib         port:a52dec \
                     port:aalib \
@@ -99,13 +99,13 @@ configure.args      --disable-silent-rules \
                     --enable-vpx \
                     --enable-xinerama \
                     --enable-xvmc \
-                    --with-aom \
                     --with-dav1d \
                     --with-esound \
                     --with-external-dvdnav \
                     --with-fontconfig \
                     --with-freetype \
                     --with-jack \
+                    --with-libaom \
                     --with-libflac \
                     --with-imagemagick \
                     --with-sdl \