Armada XP initialization flow requires SoC registers to be
mapped very early in order to configure Snoop Filter for SMP.
Additional mapping in locore.S is redundant as proper mapping is
made in pmap_devmap_bootstrap() prior to calling cpu_setup() which
configures the Snoop Filter.
For secondaru CPUs it is better to pass VA of the SoC
registers defined in MV_BASE and PA consistent with the value
in the Device Tree.
Tested by: kevlo
77f3266653