u5500: Driver for the PWM block in Maja

Implementation of the PWM (Pulse Width Modulation) block in DB5500.
The driver implements include/linux/pwm.h.

TODO: Request PWMCLK.
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/343
Tested-by: Magnus TEMPLING <magnus.templing@stericsson.com>
Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>
Change-Id: I91fe502e88b625f8995e1e5ba96c0aadb741d851
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/2629
Reviewed-by: Magnus TEMPLING <magnus.templing@stericsson.com>
6 files changed