bus: fsl-mc: fix error return code in fsl_mc_object_allocate()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 197f4d6a ("staging: fsl-mc: fsl-mc object allocator driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1607068967-31991-1-git-send-email-zhangchangzhong@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>