ARM: dts: sunxi: Revert phy-names removal for ECHI and OHCI

This reverts commits 3d109bdc ("ARM: dts: sunxi: Remove useless
phy-names from EHCI and OHCI"), 0a3df8bb ("ARM: dts: sunxi: h3/h5:
Remove useless phy-names from EHCI and OHCI") and 3c7ab90a ("arm64:
dts: allwinner: Remove useless phy-names from EHCI and OHCI").

It turns out that while the USB bindings were not mentionning it, the PHY
client bindings were mandating that phy-names is set when phys is. Let's
add it back.

Fixes: 3d109bdc ("ARM: dts: sunxi: Remove useless phy-names from EHCI and OHCI")
Fixes: 0a3df8bb ("ARM: dts: sunxi: h3/h5: Remove useless phy-names from EHCI and OHCI")
Fixes: 3c7ab90a

 ("arm64: dts: allwinner: Remove useless phy-names from EHCI and OHCI")
Reported-by: Emmanuel Vadot <manu@bidouilliste.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20191002112651.100504-1-mripard@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>