sys/core.h is not needed by these files, therefore sys/param.h isn't
needed for MAXCOMLEN either

Reduce use of sys/param.h, or annotate the reason why it is needed
(pretty much MAXCOMLEN for struct process or struct core), and remove
sys/vnode.h where not needed

fix format strings; ok @kettenis

Remove NULL-checks before free(). ok tb@

Avoid using PAGE_SHIFT, PAGE_SIZE, and PAGE_MASK defines, since we already
know it from the machine.
ok miod

spaces

Pull more headers to avoid warnings about structs being undefined.

Kernel crash dump support for arm-based platform, with minimal support in
libkvm, but all the necessary information for a complete _kvm_kvatop() is
available in the crash dump.

for some of internal functions use paddr_t where phys addr is intended insteadd of u_long; miod@ ok

Kill (almost all) warnings.

knf; ok millert

Stub this out, copied from other archs with this stubbed out.