rpmsg: glink: remove IRQF_NO_SUSPEND flag while requesting irq

Using IRQF_NO_SUSPEND flag may not mark irq wakeup capable.

Use enable_irq_wake to mark glink irq wake up capable.

Change-Id: I0fb5010ff1450a3bd15894a3d4706d7bd73e8cac
Signed-off-by: Deepak Kumar Singh <deesin@codeaurora.org>