trace: properly annotate private functions as static

The following three were never a part of the public API and as such
should have never been exported by libvdpau_trace.so

Correct that by marking them as static, thus allowing the compiler
to hide them from the exported namespace.

_vdp_cap_init_planes_adapt_surface_video
_vdp_cap_init_planes_adapt_surface_bitmap
_vdp_cap_init_planes_adapt_surface_output
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Aaron Plattner <aplattner@nvidia.com>
Signed-off-by: Aaron Plattner <aplattner@nvidia.com>

trace/vdpau_trace.cpp

@@ -849,7 +849,7 @@ static bool _vdp_cap_init_planes_adapt_format_bits_indexed(
     );
 }
 
-bool _vdp_cap_init_planes_adapt_surface_video(
+static bool _vdp_cap_init_planes_adapt_surface_video(
     uint32_t   surface,
     uint32_t * surface_format,
     uint32_t * width,
@@ -874,7 +874,7 @@ bool _vdp_cap_init_planes_adapt_surface_video(
     return true;
 }
 
-bool _vdp_cap_init_planes_adapt_surface_output(
+static bool _vdp_cap_init_planes_adapt_surface_output(
     uint32_t   surface,
     uint32_t * surface_format,
     uint32_t * width,
@@ -899,7 +899,7 @@ bool _vdp_cap_init_planes_adapt_surface_output(
     return true;
 }
 
-bool _vdp_cap_init_planes_adapt_surface_bitmap(
+static bool _vdp_cap_init_planes_adapt_surface_bitmap(
     uint32_t   surface,
     uint32_t * surface_format,
     uint32_t * width,