beeceem: Add spaces before opening parentheses in if-conditionals in InterfaceTx.c

This patch adds spaces before the opening parentheses of if-conditionals to comply with offical code styling guidelines.

Signed-off-by: Ralph Mueck <linux-kernel@rmueck.de>
Signed-off-by: Matthias Oefelein <ma.oefelein@arcor.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>