staging: kpc2000: replace white spaces with tabs for kpc2000_spi.c

There are multiple wrong formats in kpc2000_spi.c,
is time to do clean work for it.

Signed-off-by: Mao Wenan <maowenan@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>