uboot-imx

MLK-22622 imx8m: Add Workaround for ROM SError issue

ROM SError happens on two cases:

1. ERR050342, on iMX8MQ HDCP enabled parts ROM writes to GPV1 register, but
when ROM patch lock is fused, this write will cause SError.

2. ERR050350, on iMX8MQ/MM/MN, when the field return fuse is burned, HAB
is field return mode, but the last 4K of ROM is still protected and cause SError.

Since ROM mask SError until ATF unmask it, so then ATF always meets the exception.
This patch works around the issue in SPL by enabling SPL Exception vectors table
and the SError exception, take the exception to eret immediately to clear the SError.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit f05dd45251ca82cc54e13a616f00744c26faab53)
(cherry picked from commit 25d059411e702a4002f1aa157839001f796dd9f6)