h264_dec: config buf specs after resolution change [1/1]

h264_dec: config buf specs after resolution change [1/1]

PD#SWPL-28501

Problem:
In V4L2 mode, resolution change will trigger reset() and all the
canvas are released with h264_reconfig(). When it continues decoding
the data with new resolution, decoder will write to invalid canvas.

Solution:
In vh264_set_params() call config_buf_specs in V4L2 mode.

Verify:
U212
gst-play-1.0 http://www.bok.net/dash/tears_of_steel/cleartext/stream.mpd

Change-Id: Ia57678e91001d719b9477a62fcae7688455decfd
Signed-off-by: Song Zhao <song.zhao@amlogic.com>