staging: greybus: timesync.c: Fixed WARNING for brace issue

Removed a checkpatch warning for braces on single argument if and else
statement.

Signed-off-by: Chase Metzger <chasemetzger15@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>