arm: emif-common: Add ecc specific emif registers

This is a slight difference in emif_ddr_phy_status register offsets for
DRA7xx EMIF and older versions. And ecc registers are available only
in DRA7xx EMIC. Add support for this difference and ecc registers.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2 files changed