x86/g722dsp: add ff_g722_apply_qmf_sse2

Reviewed-by: Michael Niedermayer <[email protected]>
Signed-off-by: James Almer <[email protected]>
diff --git a/libavcodec/g722dsp.h b/libavcodec/g722dsp.h
index cab4a5f..c956a1e 100644
--- a/libavcodec/g722dsp.h
+++ b/libavcodec/g722dsp.h
@@ -29,5 +29,6 @@
 
 void ff_g722dsp_init(G722DSPContext *c);
 void ff_g722dsp_init_arm(G722DSPContext *c);
+void ff_g722dsp_init_x86(G722DSPContext *c);
 
 #endif /* AVCODEC_G722DSP_H */