drivers: Introduce dev_set_name() ...

Introduce dev_set_name() in order to hide implementation details of
setting device's name so it'd be easier to change it.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

phy: Introduce to_usbphy conversion function ...

The generic phy support layer has the necessary list handling
and phy retrieval functions, so we should reuse them for usb
phys. This adds a phy_to_usbphy() conversion function which
drivers can implement which attach to the generic phy layer
and are really usb phys.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

phy: Introduce of_phy_get_by_phandle ...

Currently generic phy support assumes that the standard phy binding from
dts/Bindings/phy/phy-bindings.txt is used. This adds a helper function
which can be used to retrieve a phy when this standard binding is not
used.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

add generic PHY framework ...

This brings in the generix PHY framework from Linux.
I tried to strip it down as much as possible while
keeping it useful.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>