soc/mediatek: Fix register access for EINT

We should be writing to the address of reg[i], instead of the address
whose value is reg[i].

Change-Id: I4fb78f974155725a91aad3a5450733d24b57af15
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/86073
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@google.com>

src/soc/mediatek/common/eint_event.c

@@ -17,7 +17,7 @@ static void enable_eint_event(const struct eint_event_info *event)
 	int i;
 
 	for (i = 0; i < port; i++)
-		write32p(reg[i], EINT_VALUE);
+		write32(&reg[i], EINT_VALUE);
 }
 
 void unmask_eint_event_mask(void)