msm: ADSPRPC: Use spin_lock_irqsave in glink notify handler

Use appropriate spin lock and unlock functions with irq save and
restore in glink notify handler to avoid deadlock.

Change-Id: I3cf87a9a7ec098b8c5de62501440ca3f0b977abf
Acked-by: Viswanatham Paduchuri <vpaduchu@qti.qualcomm.com>
Signed-off-by: Tharun Kumar Merugu <mtharu@codeaurora.org>