msm: vidc: Fix video encoder rotation and downscaling

When client sets input height/width on video driver,
video driver sets input as well as output height/width
to this value and on firmware. Because of this reason,
if input height/width is configured after client
configures output height/width video driver loses the
information from output port configuration. Fix this
by not updating output params when input format is set.

Change-Id: I1cf0d6ac2f01fc5cf8fc5120c9999f2495db4d54
Signed-off-by: Vinay Kalia <vkalia@codeaurora.org>