staging: crystalhd: fix a style warning

we dont need braces around a single statement blocks

style WARNINGS:
drivers/staging/crystalhd/crystalhd_cmds.c:311: WARNING: braces {} are not necessary for any arm of this statement

Signed-off-by: Devendra Naga <devendra.aaru@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>