hrtimer: retain pinned state in timer->state

hrtimer pinned state not retained due to changes in commit
c30521f5 "Merge android-4.9.208(9759f952) into msm-4.9"
fixing it by retaining pinned state in timer->state.

Change-Id: I75c12bc924087bb40bdd6aac611182c399afdc86
Signed-off-by: Srinivasarao P <spathi@codeaurora.org>