USB: spcp8x5: correct handling of CS5 setting

commit 711fbdf upstream.

This patch removes an erroneous check of CSIZE, which made it impossible
to set
CS5.

Compiles clean, but couldn't test against hardware.

Signed-off-by: Colin Leitner <colin.leitner@gmail.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>