msm: mdss: Fix fence installation when retire fence is skipped

A previous change caused the release fence to not be installed
when the retire fence was skipped. Install the release fence
regardless of the retire fence status.

Change-Id: I13fa1e98984867d8a7d9d318ece8c1a2f1c726ed
Signed-off-by: Naseer Ahmed <naseer@codeaurora.org>