USB: cytherm: Correct the code style issue of redundant spaces

Ther are many redundant spaces, which is not consistent with
the kernel code style, so remove it.

Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
Link: https://lore.kernel.org/r/20230804091713.41503-1-ruanjinjie@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>