config: enable dpaaX drivers for generic ARMv8

config: enable dpaaX drivers for generic ARMv8

This patch enables the NXP DPAA & DPAA2 drivers for
ARMV8 targets. They can be used with standard armv8 config
with command line mempool argument or newly introduced
platform mempool internal registration mechanism.

Note that the dpaa(x) specific config files are still preserved
to continue customer support. They also contain some of the ARM
performance tuning flags. e.g the default ARM cache size of 128
is not optimal for NXP platforms.

However, these configs will eventually be removed once a dynamic
mechanisms are developed to detect the performance settings.

Signed-off-by: Hemant Agrawal <hemant.agrawal@nxp.com>