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>
diff --git a/s6/soc.h b/s6/soc.h
index 7df0940..38228da 100644
--- a/s6/soc.h
+++ b/s6/soc.h
@@ -57,4 +57,7 @@
 #define DSP_FSM_TRIGER_CTRL SYSCTRL_TIMERI_CTRL
 #define DSP_FSM_TRIGER_SRC SYSCTRL_TIMERI
 
+#define AOCPU_ALIVE_REG_VAL_WR (*(volatile uint32_t *)MAILBOX_WR_MBOX04)
+#define AOCPU_ALIVE_REG_VAL_RD (*(volatile uint32_t *)MAILBOX_RD_MBOX04)
+
 #endif