phy: realtek: Realtek PHYs should depend on ARCH_REALTEK

The Realtek SoC USB2 and USB3 PHY Transceivers are only present on
Realtek Digital Home Center (DHC) RTD series SoCs. Hence add a
dependency on ARCH_REALTEK, to prevent asking the user about these
drivers when configuring a kernel without Realtek SoC support.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Link: https://lore.kernel.org/r/28925[e-mail]
Signed-off-by: Vinod Koul <[e-mail]>

drivers/phy/realtek/Kconfig

···
 #
 # 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
···
 	  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