msm: vidc: Fix issue in split mode for UBWC output

Change in split mode is needed only where there is change
in scan type in linear output case. Add change to enable
this only for linear output.

Change-Id: I57e60329fa7ad0d3f4fc88fa16b996d620b78cbe
Signed-off-by: Surajit Podder <spodder@codeaurora.org>