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.

Note that because of dependencies and merge conflicts these are
based on Rafael's pm-wakeirq and Greg's tty-next branches.
Merge branch 'wakeirq-8250' into omap-for-v4.2/wakeirq-v2