[media] staging: sir: remove unselectable Tekram and Actisys

Support for these sir ports is not compiled in by default, it has to
be enabled by manually defining LIRC_TEKRAM, LIRC_SIR_ACTISYS_ACT200L
or LIRC_SIR_ACTISYS_ACT220L somewhere. This cannot be done from Kconfig
at all so remove them from the driver.
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>