Fix typo in dvvideo decoder dependencies.

Fixes compilation with --disable-everything --enable-decoder=dvvideo

configure

@@ -1709,7 +1709,7 @@ dca_decoder_select="mdct"
 dirac_decoder_select="dsputil dwt golomb videodsp"
 dnxhd_decoder_select="dsputil"
 dnxhd_encoder_select="aandcttables dsputil mpegvideoenc"
-dv_decoder_select="dsputil"
+dvvideo_decoder_select="dsputil"
 dxa_decoder_select="zlib"
 eac3_decoder_select="ac3_decoder"
 eac3_encoder_select="ac3_encoder"