staging: speakup: main: switch multiple assignment for one assignment per line

One assignment per line is preferred, instead of multiple assignments.
To make it more readable.
Issue found with checkpatch.

Signed-off-by: Lourdes Pedrajas <lu@pplo.net>
Reviewed-by: Samuel Thibautl <samuel.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/20200315221247.16629-1-lu@pplo.net


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>