usb: ehci-omap: implement backported omap_ehci_ulpi_{read,write} and default PHY settings (on boot) from p-android-omap-3.4.

We use drivers from Moto 3.0.8 kernel including Stargo's 3.4 backports. Synced with latest CM changes:

d582f381f97412350bf693bd10a0d7aca32bf9bb
826bda4ee9b262cbc3905e4a73c761be7103975a
mfd: Move omap-usb-host usbhs init before allocing child dev

mfd: Move omap-usb-host usbhs init before allocing child dev

[backported from p-android-omap-3.4]

There could be possible race condition where the host dev's
are alloced and added to platform dev just before usbhs_init.
Just move usbhs_init before adding child dev.

Change-Id: I3c54db97f39c7714427e738560fba8076283e66d
CC: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Govindraj.R <govindraj.raja@ti.com>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
omap4-common: improve HDMI video-mode selection

Change-Id: If0fa25f8be2e629bf9ad3b7b79b4ed37747d7bfd