lavf/qsv: use av_cold for init/uninit

Signed-off-by: Zhong Li <zhong.li@intel.com>

libavfilter/vf_deinterlace_qsv.c

@@ -83,7 +83,7 @@ typedef struct QSVDeintContext {
     int mode;
 } QSVDeintContext;
 
-static void qsvdeint_uninit(AVFilterContext *ctx)
+static av_cold void qsvdeint_uninit(AVFilterContext *ctx)
 {
     QSVDeintContext *s = ctx->priv;
     QSVFrame *cur;

libavfilter/vf_overlay_qsv.c

@@ -345,7 +345,7 @@ static int overlay_qsv_init(AVFilterContext *ctx)
     return 0;
 }
 
-static void overlay_qsv_uninit(AVFilterContext *ctx)
+static av_cold void overlay_qsv_uninit(AVFilterContext *ctx)
 {
     QSVOverlayContext *vpp = ctx->priv;
 

libavfilter/vf_scale_qsv.c

@@ -109,7 +109,7 @@ typedef struct QSVScaleContext {
     char *format_str;
 } QSVScaleContext;
 
-static int qsvscale_init(AVFilterContext *ctx)
+static av_cold int qsvscale_init(AVFilterContext *ctx)
 {
     QSVScaleContext *s = ctx->priv;
 
@@ -126,7 +126,7 @@ static int qsvscale_init(AVFilterContext *ctx)
     return 0;
 }
 
-static void qsvscale_uninit(AVFilterContext *ctx)
+static av_cold void qsvscale_uninit(AVFilterContext *ctx)
 {
     QSVScaleContext *s = ctx->priv;