ARM: dts: NSP: modify second CPU address

NSP B0 has a different address for the second core.  Since there should
not be any Ax versions in the field, it should be safe to universally
change this.

Signed-off-by: Jon Mason <jonmason@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>