microblaze: intc: Clean driver init function
microblaze: intc: Clean driver init function

- Use of_iomap
- Use of_property_read_u32
- Fix printk

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

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