sunxi: add bank detection code to H3 DRAM initialization code

Some DDR2 DRAM have only four banks, not eight.

Add code to detect this situation.

Signed-off-by: Icenowy Zheng <icenowy@aosc.xyz>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Tested-by: Jagan Teki <jagan@amarulasolutions.com>
1 file changed