soc/mediatek/mt8186: Enable the protection of DEVAPC

Enable the protection for DEVAPC registers of AO domain.

TEST=build pass.
BUG=b:244250435

Signed-off-by: Runyang Chen <runyang.chen@mediatek.corp-partner.google.com>
Change-Id: I8535438d4c7da29c9dcd97be9a2af05ea4690064
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67434
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/mt8186/devapc.c

@@ -1300,6 +1300,7 @@ void dapc_init(void)
 
 		/* Init dapc */
 		write32(getreg(devapc_ao_base, AO_APC_CON), 0x0);
+		write32(getreg(devapc_ao_base, AO_APC_CON), 0x1);
 
 		/* Initialization */
 		if (devapc_init[i].init)