tty: remove CMSPAR ifdefs

CMSPAR is defined by all architectures since commit 6bf08cb2
("[PATCH] Add CMSPAR to termbits.h for powerpc and alpha").

Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220513082906.11096-2-ilpo.jarvinen@linux.intel.com


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