Build: Move MMIO into extra_params

MMIO is not a common config which is needed in all config groups.
To make CI configs easier to maintain, move MMIO into extra_params.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I05de13844d9292aa1b977b9b4c929bf3239b735e
2 files changed