msm: smd: Add smd_tiocmset api without spinlocks

tiocmset can be called from client drivers in smd callbacks which
could result in dead-lock as most of the call-backs holds spinlock
which is used by tiocmset. Add tiocmset call which does not use
spinlocks so that it can be used from smd callbacks.

Signed-off-by: Vamsi Krishna <vskrishn@codeaurora.org>