firmware: google: Unregister driver_info on failure and exit in gsmi

[ Upstream commit c6e7af0515daca800d84b9cfa1bf19e53c4f5bc3 ]

Fix a bug where the kernel module couldn't be loaded after unloading,
as the platform driver wasn't released on exit.

Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Link: https://lore.kernel.org/r/20191118101934.22526-3-patrick.rudolph@9elements.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: 32b0901e141f ("firmware: google: Unregister driver_info on failure")
Signed-off-by: Sasha Levin <sashal@kernel.org>