disp: msm: sde: fix crtc_state iteration during vm release

Iterate over the crtc old/new state and decide which ones
to process by checking the active state of both during
the vm release in error cases.

Change-Id: Iab20e89792c53fb72e0c00f1fa5091616c7afbf3
Signed-off-by: Veera Sundaram Sankaran <veeras@codeaurora.org>