Merge tag 'omap-for-v4.2/wakeirq-drivers' into for-next

Omap driver changes for v4.2 to switch drivers over to Linux generic
wake IRQ events for omap_hsmmc, 8250_omap and omap-serial
drivers.

The generic wake IRQs also fix issues that these drivers potentially
have with IRQ re-entrancy at least for serial-omap.

Please note that there are dependencies to the following commits:

4990d4fe327b ("PM / Wakeirq: Add automated device wake IRQ handling")
56f487c78015 ("PM / Runtime: Update last_busy in rpm_resume")
9809889c708e ("serial: 8250_omap: provide complete custom startup &
shutdown callbacks")

So the patches are based on Rafael's pm-wakeirq branch and Greg's
tty-linus branches bringing in few extra commits.