UPSTREAM: HID: steam: add battery device.

The wireless Steam Controller is battery operated, so add the battery
device and power information.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

(cherry picked from commit f82719790751742be02142a6fa3ff5c62c52a6ae
("HID: steam:  add battery device"))
https://github.com/torvalds/linux/commit/f82719790751742be02142a6fa3ff5c62c52a6ae



Change-Id: Ie945fffa96103a164c333b2c6c51bca44a41423b
Signed-Off-By: Siarhei Vishniakou <svv@google.com>
Bug: 136263708
Test: connected steam controller to Android