media: atomisp: fix uninitialized bug in gmin_get_pmic_id_and_addr()

media: atomisp: fix uninitialized bug in gmin_get_pmic_id_and_addr()

BugLink: https://bugs.launchpad.net/bugs/1959376
[ Upstream commit cb4d67a998e97365afdf34965b069601da1dae60 ]

The "power" pointer is not initialized on the else path and that would
lead to an Oops.

Link: https://lore.kernel.org/linux-media/20211012082150.GA31086@kili
Fixes: c30f4cb2d4c7 ("media: atomisp: Refactor PMIC detection to a separate function")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>