firmware: arm_scmi: imx: Discover MISC board info from the system manager

firmware: arm_scmi: imx: Discover MISC board info from the system manager

The i.MX SCMI MISC protocol can report board information from the
System Manager (SM), including a board name and board-specific
attributes. Query this during protocol initialization.

If the firmware does not implement BOARD_INFO, handle -EOPNOTSUPP
gracefully and continue.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Message-Id: <20250904-sm-misc-api-v1-v4-4-0bf10eaabdf1@nxp.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>