drivers: phy: add Innosilicon DSI-DPHY driver

Add support for the Innosilicon DSI-DPHY driver for Rockchip SOCs.
The driver was ported from Linux and tested on a Rockchip RK3566
based device to query the panel ID via a DSI command.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig
index 1305763..f87ca8c 100644
--- a/drivers/phy/rockchip/Kconfig
+++ b/drivers/phy/rockchip/Kconfig
@@ -4,6 +4,14 @@
 
 menu "Rockchip PHY driver"
 
+config PHY_ROCKCHIP_INNO_DSIDPHY
+	bool "Rockchip INNO DSIDPHY Driver"
+	depends on ARCH_ROCKCHIP
+	select PHY
+	select MIPI_DPHY_HELPERS
+	help
+	  Support for Rockchip MIPI DPHY with Innosilicon IP block.
+
 config PHY_ROCKCHIP_INNO_USB2
 	bool "Rockchip INNO USB2PHY Driver"
 	depends on ARCH_ROCKCHIP