trivial: Style changed files

trivial: Update licenses

All of these files saw significant changes, so we update the license to
reflect this.

libplatsupport,imx: Move HW ops to driver level

Timer resource initialisation and the management of interrupts should
belong in the driver level and not the timer abstraction level. This
commits moves those operations down into the driver level for the i.MX
platforms.

Add more helpers to imx epit driver.

- epit_read gets the value of the epit counter
- epit_ticks_to_ns converts an epit tick value to ns
- epit_is_irq_raised allows the interrupt status to be queried

Add epit_set_timeout_ticks for imx platforms

Allows the epit to be programmed raw without converting from ns.

Remove pstimer_t from epit

Users now directly interact with epit interface

fix licenses