meta-arm-bsp: a5ds: Remove WIC references

The current WIC references in the A5DS config file are causing a build
break, due to not being defined.  These WIC files should be revisited
once the IOTA distro is present.

Change-Id: Ied2cd6f768625d18150ed60bd5fe317e06c7f48a
Signed-off-by: Jon Mason <jon.mason@arm.com>
Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Diego Sueiro <diego.sueiro@arm.com>