commit a7117f81 upstream.

Driver forgot to unregister charger power supply if registering of
battery supply failed in probe(). In such case the memory associated
with power supply leaked.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Fixes: 98a27664 ("power_supply: Add new lp8788 charger driver")
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>