mfd: omap-usb-tll: Add OMAP5 revision and HSIC support

The TLL module on OMAP5 has 3 channels.
HSIC mode requires the TLL channel to be in Transparent UTMI mode.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>