staging: mt7621-pci-phy: add new driver for phy part of mt7621-pci

Phy part of the pci for this SoC can be handled using a generic phy
driver. This commit extracts phy part of the mt7621-pci into a new
'mt7621-pci-phy' driver.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/Kconfig

@@ -104,6 +104,8 @@ source "drivers/staging/pi433/Kconfig"
 
 source "drivers/staging/mt7621-pci/Kconfig"
 
+source "drivers/staging/mt7621-pci-phy/Kconfig"
+
 source "drivers/staging/mt7621-pinctrl/Kconfig"
 
 source "drivers/staging/mt7621-spi/Kconfig"

drivers/staging/Makefile

@@ -42,6 +42,7 @@ obj-$(CONFIG_BCM2835_VCHIQ)	+= vc04_services/
 obj-$(CONFIG_DRM_VBOXVIDEO)	+= vboxvideo/
 obj-$(CONFIG_PI433)		+= pi433/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-pci/
+obj-$(CONFIG_SOC_MT7621)	+= mt7621-pci-phy/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-pinctrl/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-spi/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-dma/

drivers/staging/mt7621-pci-phy/Kconfig

+config PCI_MT7621_PHY
+	tristate "MediaTek MT7621 PCI PHY Driver"
+	depends on RALINK && OF
+	select GENERIC_PHY
+	help
+	  Say 'Y' here to add support for MediaTek MT7621 PCI PHY driver,
+

drivers/staging/mt7621-pci-phy/Makefile

+obj-$(CONFIG_SOC_MT7621)       += pci-mt7621-phy.o

drivers/staging/mt7621-pci-phy/TODO

+
+- general code review and cleanup
+
+Cc:  NeilBrown <neil@brown.name> and Sergio Paracuellos <sergio.paracuellos@gmail.com>