linux-phytec-fsl

MLK-14487-1 rpmsg: imx: validate the rpmsg on imx7ulp

- change the module_init to subsys_initcall.
Otherwise, the pf1550-rpmsg would be invoked before
the rpmsg bus driver on imx7ulp.
Then, sdhc wouldn't be powered up properly if pf1550
isn't functional.
- remove the no longer used imc_rpmsg_exit.
- pass the real device id if the shared irq is requested.

Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Tested-by: Daniel Baluta <daniel.baluta@nxp.com>