Revert "phy: realtek: usb: Add driver for the Realtek SoC USB 2.0 PHY"

This reverts commit 134e6d25f6.

The recently added Realtek PHY drivers depend on the new port status
notification mechanism which was built on the deprecated USB PHY
implementation and devicetree binding.

Specifically, using these PHYs would require describing the very same
PHY using both the generic "phy" property and the deprecated "usb-phy"
property which is clearly wrong.

We should not be building new functionality on top of the legacy USB PHY
implementation even if it is currently stuck in some kind of
transitional limbo.

Revert the new Realtek PHY drivers for now so that the port status
notification interface can be reverted and replaced.

Fixes: 134e6d25f6 ("phy: realtek: usb: Add driver for the Realtek SoC USB 2.0 PHY")
Cc: stable@vger.kernel.org      # 6.6
Cc: Stanley Chang <stanley_chang@realtek.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20231106110654.31090-3-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/phy/Kconfig

@@ -87,7 +87,6 @@ source "drivers/phy/motorola/Kconfig"
 source "drivers/phy/mscc/Kconfig"
 source "drivers/phy/qualcomm/Kconfig"
 source "drivers/phy/ralink/Kconfig"
-source "drivers/phy/realtek/Kconfig"
 source "drivers/phy/renesas/Kconfig"
 source "drivers/phy/rockchip/Kconfig"
 source "drivers/phy/samsung/Kconfig"

drivers/phy/Makefile

@@ -26,7 +26,6 @@ obj-y					+= allwinner/	\
 					   mscc/	\
 					   qualcomm/	\
 					   ralink/	\
-					   realtek/	\
 					   renesas/	\
 					   rockchip/	\
 					   samsung/	\

drivers/phy/realtek/Kconfig

@@ -1,20 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-#
-# Phy drivers for Realtek platforms
-#
-
-if ARCH_REALTEK || COMPILE_TEST
-
-config PHY_RTK_RTD_USB2PHY
-	tristate "Realtek RTD USB2 PHY Transceiver Driver"
-	depends on USB_SUPPORT
-	select GENERIC_PHY
-	select USB_PHY
-	select USB_COMMON
-	help
-	  Enable this to support Realtek SoC USB2 phy transceiver.
-	  The DHC (digital home center) RTD series SoCs used the Synopsys
-	  DWC3 USB IP. This driver will do the PHY initialization
-	  of the parameters.
-
-endif # ARCH_REALTEK || COMPILE_TEST

drivers/phy/realtek/Makefile

@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_PHY_RTK_RTD_USB2PHY)	+= phy-rtk-usb2.o