RX51 has a secure logic which uses different parameters compared to
traditional implementation. So, make the generic secure acr write
over-ride-able by board file and refactor rx51 code to use this.
While at it, enable the OMAP3 specific errata code for 454179, 430973,
Signed-off-by: Nishanth Menon <firstname.lastname@example.org>
Reviewed-by: Tom Rini <email@example.com>