phy: mediatek: Move mtk_mipi_dsi_phy driver into drivers/phy/mediatek folder

mtk_mipi_dsi_phy is currently placed inside mediatek drm driver, but it's
more suitable to place a phy driver into phy driver folder, so move
mtk_mipi_dsi_phy driver into phy driver folder.

Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Acked-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
diff --git a/drivers/phy/mediatek/Makefile b/drivers/phy/mediatek/Makefile
index 6325e38..ace660f 100644
--- a/drivers/phy/mediatek/Makefile
+++ b/drivers/phy/mediatek/Makefile
@@ -11,3 +11,8 @@
 phy-mtk-hdmi-drv-y			+= phy-mtk-hdmi-mt2701.o
 phy-mtk-hdmi-drv-y			+= phy-mtk-hdmi-mt8173.o
 obj-$(CONFIG_PHY_MTK_HDMI)		+= phy-mtk-hdmi-drv.o
+
+phy-mtk-mipi-dsi-drv-y			:= phy-mtk-mipi-dsi.o
+phy-mtk-mipi-dsi-drv-y			+= phy-mtk-mipi-dsi-mt8173.o
+phy-mtk-mipi-dsi-drv-y			+= phy-mtk-mipi-dsi-mt8183.o
+obj-$(CONFIG_PHY_MTK_MIPI_DSI)		+= phy-mtk-mipi-dsi-drv.o