SoC S6: mailbox: add aocpu alive detection and mailbox retry [2/4]

PD#SWPL-172976

Problem:
add aocpu alive detection and mailbox retry mechanism to
avoid mailbox message lost due to aocpu crash or mailbox
signal lost occasionally

Solution:
add aocpu alive detection and mailbox retry mechanism

Verify:
S6-BL201

Change-Id: I22e62119ffbe4ee862971b3acffe6d877d50bdf4
Signed-off-by: Yao Jie <jie.yao@amlogic.com>
1 file changed