rpi3 regression in v4.15: no more USB after 'Fix DTC warnings about missing phy-cells' patch

[Hans Verkuil]

Hi Stefan, Eric,

Commit 014d6da6cb2525d7f48fb08c705cb130cc7b5f4a ('Fix DTC warnings about
missing phy-cells') broke USB support on my Raspberry Pi 3 (i.e. lsusb
shows nothing). After reverting this patch lsusb once again shows the USB devices.

It appears that the Raspberry Pi 2 also has the same problem (not surprisingly):

https://raspberrypi.stackexchange.com/questions/77052/no-usb-with-upstream-kernel

To be honest, I am no USB PHY expert and I don't know exactly what is wrong with
this patch, but there is definitely something wrong with it.

BTW, I use the latest u-boot to load the kernel. Not sure if that makes a difference.

Regards,

	Hans