EDAC/synopsys: Add driver support for i.MX platforms

i.MX8MP use Synopsys v3.70a DDR controller IP so add support for it with
the Synopsys driver.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20220428023209.18087-1-sherry.sun@nxp.com