PM / devfreq: imx: Register i.MX8MP interconnect device

Same to i.MX8MM/N/Q, register i.MX8MP interconnect device to make
i.MX8MP Interconnect driver work.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Link: https://lore.kernel.org/r/20220703091132.1412063-10-peng.fan@oss.nxp.com


Signed-off-by: Georgi Djakov <djakov@kernel.org>