ARM: dts: at91: tse850: add properties for gpio-line-names

Signal names are one-to-one copies from the schematics, except VBUS
which is an unnamed signal there.

Signed-off-by: Peter Rosin <peda@axentia.se>
[claudiu.beznea: add 1 indentation tab before index based comment]
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/32995b53-7f73-936f-a81d-5f1969f64910@axentia.se