pwm: support txhd2 pwm driver [1/2]

PD#SWPL-119880

Problem:
there is no txhd2 pwm driver

Solution:
need to support txhd2 pwm driver

Verify:
txhd2 pxp

Change-Id: I01274ab21564eeedb5abd69bad73f8cbdec6a4ae
Signed-off-by: junyi.zhao <junyi.zhao@amlogic.com>
1 file changed