saradc: s1a: support saradc/keypad [1/1]

PD#SWPL-134719

Problem:
S1A Silicon Bringup.

Solution:
S1A and TXHD2 have the same controller.

Verify:
S1A/BG201

Change-Id: I23194f90054b7018c147e31ad6cc5b0d791083f6
Signed-off-by: Huqiang Qin <huqiang.qin@amlogic.com>
1 file changed