beeceem: Fix broken indentations in InterfaceRx.c

Checkpatch reports a lot of spaces at the beginning of lines and other
wrong indentations. This patch fixes these issues.

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