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Support stop M7 with SIP call.
Per IC team, to rekick M7 need follow steps.
If M7 already in WFI, perform below steps.
a) Set [0x303A_002C].0=0 [ request SLEEPHOLDREQn ]
b) Wait [0x303A_00EC].1 = 0 [ wait SLEEPHOLDACKn ]
c) Set GPR.CPUWAIT=1
d) Set [0x303A_002C].0=1 [ de-assert SLEEPHOLDREQn ]
e) Set SRC_M7_RCR[3:0] = 0xE0 [ reset M7 core/plat ]
f) Wait SRC_M7_RCR[3:0] = 0x8
g) Init TCM or DDR
h) Set GPR.INITVTOR
i) Set GPR.CPUWAIT=0, M7 starting running
Add a timeout check, if timeout, still perform force reset, in this
way no need to rely on M7 team's image wfi support ready.
Return a1,a2 to caller to check timeout or reset fail.
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
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