feat(plat/mdeiatek/mt8195): add DFD control in SiP service

DFD (Design for Debug) is a debugging tool, which scans
flip-flops and dumps to internal RAM on the WDT reset.
After system reboots, those values could be showed for
debugging.

BUG=b:192429713

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: I02c6c862b6217bc84c83a09b533bd53ec19b06f7
diff --git a/plat/mediatek/mt8195/platform.mk b/plat/mediatek/mt8195/platform.mk
index 48a2f72..ef7ff81 100644
--- a/plat/mediatek/mt8195/platform.mk
+++ b/plat/mediatek/mt8195/platform.mk
@@ -15,6 +15,7 @@
                  -I${MTK_PLAT}/common/drivers/uart/               \
                  -I${MTK_PLAT}/common/lpm/                        \
                  -I${MTK_PLAT_SOC}/drivers/dcm                    \
+                 -I${MTK_PLAT_SOC}/drivers/dfd                    \
                  -I${MTK_PLAT_SOC}/drivers/dp/                    \
                  -I${MTK_PLAT_SOC}/drivers/emi_mpu/               \
                  -I${MTK_PLAT_SOC}/drivers/gpio/                  \
@@ -60,6 +61,7 @@
                 ${MTK_PLAT_SOC}/bl31_plat_setup.c                     \
                 ${MTK_PLAT_SOC}/drivers/dcm/mtk_dcm.c                 \
                 ${MTK_PLAT_SOC}/drivers/dcm/mtk_dcm_utils.c           \
+                ${MTK_PLAT_SOC}/drivers/dfd/plat_dfd.c                \
                 ${MTK_PLAT_SOC}/drivers/dp/mt_dp.c                    \
                 ${MTK_PLAT_SOC}/drivers/emi_mpu/emi_mpu.c             \
                 ${MTK_PLAT_SOC}/drivers/gpio/mtgpio.c                 \