st/vdpau: use bicubic filter for scaling(v6.1)

st/vdpau: use bicubic filter for scaling(v6.1)

use bicubic filtering as high quality scaling L1.

v2: fix a typo and add a newline to code
v3: -render the unscaled image on a temporary surface (Christian)
    -apply noise reduction and sharpness filter on
     unscaled surface
    -render the final scaled surface using bicubic
     interpolation
v4: support high quality scaling
v5: set dst_area and dst_clip in bicubic filter
v6: set buffer layer before setting dst_area
v6.1: add PIPE_BIND_LINEAR when creating resource

Signed-off-by: Nayan Deshmukh <nayan26deshmukh@gmail.com>
Reviewed-by: Christian König <christian.koenig@amd.com>