hwc: RGB888 is considered as a VIDEO type

For mpq8092, RGB888 is the output video format, so need to make
it a video buffer type, so that VIG pipe gets allocated for
it. Another reason is that GPU cannot process RGB888, so marking
it as a VIDEO layer will ensure that it will get picked by MDP.

Change-Id: I5d1812a70f5e4d1fb7448d0a145a15c07c6fc188
1 file changed