pwm: s1a pwm bringup [2/3]

PD#SWPL-120743

Problem:
need support pwm driver on bl30

Solution:
support pwm driver

Verify:
s1a pxp

Change-Id: Ibfa7a6e51048150d5383778b8a4ec2ff0c67856a
Signed-off-by: junyi.zhao <junyi.zhao@amlogic.com>
1 file changed