firmware: ti_sci: Add BOARDCFG_MANAGED mode support
In BOARDCFG_MANAGED mode, the low power mode configuration is done
statically for the DM via the boardcfg. Constraints are not supported,
and prepare_sleep() is not needed.
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Kendall Willis <k-willis@ti.com>
Signed-off-by: Thomas Richard (TI) <thomas.richard@bootlin.com>
Link: https://patch.msgid.link/20260519-ti-sci-jacinto-s2r-restore-irq-v9-1-c550a8ae0f31@bootlin.com
Signed-off-by: Nishanth Menon <nm@ti.com>