video: add MIPI DSI host controller bridge

Add a Synopsys Designware MIPI DSI host bridge driver, based on the
Rockchip version from rockchip/dw-mipi-dsi.c with phy & bridge APIs.

Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index 07aaca9..0d35470 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -45,6 +45,7 @@
 obj-$(CONFIG_VIDEO_COREBOOT) += coreboot.o
 obj-$(CONFIG_VIDEO_DA8XX) += da8xx-fb.o videomodes.o
 obj-$(CONFIG_VIDEO_DW_HDMI) += dw_hdmi.o
+obj-$(CONFIG_VIDEO_DW_MIPI_DSI) += dw_mipi_dsi.o
 obj-$(CONFIG_VIDEO_EFI) += efi.o
 obj-$(CONFIG_VIDEO_FSL_DCU_FB) += fsl_dcu_fb.o videomodes.o
 obj-$(CONFIG_VIDEO_IPUV3) += imx/