vmw_balloon: release lock on error in vmballoon_reset()

vmw_balloon: release lock on error in vmballoon_reset()

BugLink: https://bugs.launchpad.net/bugs/1821607
commit d04071a5d6413b65f17f7bd6e2bdb22e22e4ace7 upstream.

We added some locking to this function but forgot to drop the lock on
these two error paths.  This bug would lead to an immediate deadlock.

Fixes: c7b3690fb152 ("vmw_balloon: stats rework")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@vger.kernel.org
Reviewed-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>