armv8/ls2085RDB: Update board version print logic

As per updated board document, no need to substract 1 from arch[BRD]
bit field. Default value + 'A' represents the board revision.

So update board version print logic to reflect the same.

Signed-off-by: Prabhakar Kushwaha <prabhakar at freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
1 file changed