Add generic i.MX8 SoC driver along with the i.MX8MQ SoC specific code.
For now, only i.MX8MQ revision B1 is supported. For any other, i.MX8MQ
revision it will print 'unknown'.
Signed-off-by: NAbel Vesa <abel.vesa@nxp.com>
Reviewed-by: NLeonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>