usb: common: usb-conn-gpio: use a unique name for usb connector device

usb: common: usb-conn-gpio: use a unique name for usb connector device

[ Upstream commit d4e5b10c55627e2f3fc9e5b337a28b4e2f02a55e ]

The current implementation of the usb-conn-gpio driver uses a fixed
"usb-charger" name for all USB connector devices. This causes conflicts
in the power supply subsystem when multiple USB connectors are present,
as duplicate names are not allowed.

Use IDA to manage unique IDs for naming usb connectors (e.g.,
usb-charger-0, usb-charger-1).

Signed-off-by: Chance Yang <chance.yang@kneron.us>
Link: https://lore.kernel.org/r/20250411-work-next-v3-1-7cd9aa80190c@kneron.us
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>