Staging: bcm: Prototypes.h: fix checkpatch errors: blank lines

This patch improves coding style in Prototypes.h:
Exactly one blank line after each declaration

Signed-off-by: Martin Gumbrecht <martin.gumbrecht@googlemail.com>
Signed-off-by: Christian Bay <christian.bay@studium.fau.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>