If device_add() succeeds, we should call device_del() when want to
get rid of it, so move it into proper jump symbol.

Otherwise, when __power_supply_register() returns fail and goto
wakeup_init_failed to exit, there is still residue device file in sysfs.
When attempt to probe device again, sysfs would complain as below:

sysfs: cannot create duplicate filename '/devices/platform/i2c/i2c-0/0-001c/power_supply/adp5061'
Call Trace:
 dump_stack_lvl+0x68/0x85
 sysfs_warn_dup.cold+0x1c/0x29
 sysfs_create_dir_ns+0x1b1/0x1d0
 kobject_add_internal+0x143/0x390
 kobject_add+0x108/0x170

Fixes: 80c6463e ("power_supply: Fix Oops from NULL pointer dereference from wakeup_source_activate")
Signed-off-by: Zeng Heng <zengheng4@huawei.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>