key: fix wakeup issues of gpiokey and adckey in freeze mode [1/1]

key: fix wakeup issues of gpiokey and adckey in freeze mode [1/1]

PD#SWPL-14597

Problem:
- it is risky to replace directly system_freezable_wq with system_wq
for input poll device.
- the system can't be awakened by gpiokey or adckey when system in
freeze mode.

Solution:
- because of the input poll-device can't compatible freeze mode, we
replace it with input device.
- perfect wakeup operation when system works in freeze mode.

Verify:
test pass on ac200

Change-Id: I81c867da7325480712aa5903289e02ebb20d6f07
Signed-off-by: Xingyu Chen <xingyu.chen@amlogic.com>