In order to allow runtime timeslot route changes, disabling channel TSA
entries needs to be supported.

Add support for this new feature.
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Link: https://lore.kernel.org/r/20231205152116.122512-13-herve.codina@bootlin.com