microblaze: Define readq and writeq IO helper function
microblaze: Define readq and writeq IO helper function

Some drivers check if readq/writeq functions are defined.
If not internal driver functions are used which cause
compilation failures.

Signed-off-by: Michal Simek <b20e59da6aeb5cea6c82b021069d69f63616c55d@xilinx.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs