net: phy: move realtek PHY driver to its own subdirectory

In preparation of adding a source file with hwmon support, move the
Realtek PHY driver to its own subdirectory and rename realtek.c to
realtek_main.c.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/c566551b-c915-4e34-9b33-129a6ddd6e4c@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/phy/Kconfig

@@ -350,10 +350,7 @@ config QSEMI_PHY
 	help
 	  Currently supports the qs6612
 
-config REALTEK_PHY
-	tristate "Realtek PHYs"
-	help
-	  Supports the Realtek 821x PHY.
+source "drivers/net/phy/realtek/Kconfig"
 
 config RENESAS_PHY
 	tristate "Renesas PHYs"

drivers/net/phy/Makefile

@@ -95,7 +95,7 @@ obj-$(CONFIG_NXP_CBTX_PHY)	+= nxp-cbtx.o
 obj-$(CONFIG_NXP_TJA11XX_PHY)	+= nxp-tja11xx.o
 obj-y				+= qcom/
 obj-$(CONFIG_QSEMI_PHY)		+= qsemi.o
-obj-$(CONFIG_REALTEK_PHY)	+= realtek.o
+obj-$(CONFIG_REALTEK_PHY)	+= realtek/
 obj-$(CONFIG_RENESAS_PHY)	+= uPD60620.o
 obj-$(CONFIG_ROCKCHIP_PHY)	+= rockchip.o
 obj-$(CONFIG_SMSC_PHY)		+= smsc.o

drivers/net/phy/realtek/Kconfig

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config REALTEK_PHY
+	tristate "Realtek PHYs"
+	help
+	  Currently supports RTL821x/RTL822x and fast ethernet PHYs

drivers/net/phy/realtek/Makefile

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+realtek-y			+= realtek_main.o
+obj-$(CONFIG_REALTEK_PHY)	+= realtek.o