For VM-fault test cases, use 0x4 rather than NULL as the address from which
to derive test capabilities: as NULL is now untagged, we would get tag
violations rather than VM faults.
Update a further interest of $pcc comparison to check only for base and
length, disregarding offset, as $pcc.offset is now the saved $pc,
whereas the class's code-capability offset will be the entry address.
When the kernel prints capability registers for debugging purpose, don't
0-fill types, which we now allocate as integers rather than treating as
addresses.  Sort permissions towards the front as they are a fixed-width
field.