configure: add mv30 blockdsp dependency

fix link error introduced in 481ebb1c8b

Signed-off-by: Peter Ross <pross@xvid.org>
Reviewed-by: Anton Khirnov <anton@khirnov.net>

configure

@@ -2790,6 +2790,7 @@ msmpeg4v3_decoder_select="h263_decoder"
 msmpeg4v3_encoder_select="h263_encoder"
 mss2_decoder_select="mpegvideo qpeldsp vc1_decoder"
 mts2_decoder_select="mss34dsp"
+mv30_decoder_select="blockdsp"
 mvha_decoder_deps="zlib"
 mvha_decoder_select="llviddsp"
 mwsc_decoder_deps="zlib"