lavc/takdsp: R-V V decorrelate_ls

C908:
decorrelate_ls_c: 69.7
decorrelate_ls_rvv_i32: 27.2

Signed-off-by: Rémi Denis-Courmont <[email protected]>
diff --git a/libavcodec/takdsp.h b/libavcodec/takdsp.h
index c05b574..55f1a10 100644
--- a/libavcodec/takdsp.h
+++ b/libavcodec/takdsp.h
@@ -29,6 +29,7 @@
 } TAKDSPContext;
 
 void ff_takdsp_init(TAKDSPContext *c);
+void ff_takdsp_init_riscv(TAKDSPContext *c);
 void ff_takdsp_init_x86(TAKDSPContext *c);
 
 #endif /* AVCODEC_TAKDSP_H */