staging: wilc1000: set_channel: remove blank line after open brace

This patch removes blank line after open brace '{' found by
checkpatch.pl

CHECK: Blank lines aren't necessary after an open brace '{'
drivers/staging/wilc1000/wilc_wfi_cfgoperations.c:664:

Signed-off-by: Chaehyun Lim <chaehyun.lim@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>