plat: imx8m: move hab file to common dir of imx8m

As the i.MX8MM and i.MX8MQ share the same hab file, move it
to common/imx8m, make it reusable for all i.MX8M SOCs.

Signed-off-by: Bai Ping <ping.bai@nxp.com>
(cherry picked from commit a15a09e462c9a24e42084e3043aa992c59875d86)
3 files changed