Staging: vt6655: mac: Remove extra braces

Remove braces from an if block as it comprises of a single statement.
Fix checkpatch warning: braces {} are not necessary for single statement
blocks

Signed-off-by: Shivani Bhardwaj <shivanib134@gmail.com>
Reviewed-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>