soc/mediatek/mt8189: Enable timer compensation v2.5

Enable timer compensation v2.5 for MT8189 systimer.

BUG=b:379008996
BRANCH=none
TEST=Check SYSTIMER_BASE register is configurated correctly.

Change-Id: I28c051c2e51481464f5dacb4c93f41e4f7e62501
Signed-off-by: Ke Zheng <ot_ke.zheng@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85689
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/mt8189/Makefile.mk

@@ -4,7 +4,7 @@ ifeq ($(CONFIG_SOC_MEDIATEK_MT8189),y)
 
 all-y += ../common/gpio.c ../common/gpio_op.c gpio.c
 all-$(CONFIG_SPI_FLASH) += spi.c
-all-y += timer.c
+all-y += ../common/timer_prepare.c timer.c
 all-y += ../common/uart.c
 
 bootblock-y += bootblock.c

src/soc/mediatek/mt8189/timer.c

@@ -8,8 +8,11 @@
 #include <arch/lib_helpers.h>
 #include <commonlib/helpers.h>
 #include <delay.h>
+#include <soc/timer.h>
 
 void init_timer(void)
 {
-	raw_write_cntfrq_el0(13 * MHz);
+	timer_prepare();
+
+	raw_write_cntfrq_el0(TIMER_MHZ * MHz);
 }