staging: kpc2000: fix brace issues in kpc2000_spi.c

Fixes issues found by checkpatch:

- "WARNING: braces {} are not necessary for single statement blocks"
- "WARNING: braces {} are not necessary for any arm of this statement"

Signed-off-by: Simon Sandström <simon@nikanor.nu>
Link: https://lore.kernel.org/r/20190701091819.18528-1-simon@nikanor.nu


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