gcx: two pass filter fixes.

Use the destination format (RGB) for the temporary buffer
if destination angle is not 0 degree due to a hardware
limitation for 4:2:2 rotated destination.

Performance is optimized for temporary buffer by setting
proper buffer geomerty.

Change-Id: Ie53da18fe854adeaaf3d568605bb8630288aee5d
Signed-off-by: Alexei Shlychkov <x0177296@ti.com>