Merge patch series "Support VMCOREINFO export for RISCV64"

Add arch_crash_save_vmcoreinfo(), which exports VM layout(MODULES,
VMALLOC, VMEMMAP ranges and KERNEL_LINK_ADDR), va bits and ram base for
vmcore.

* b4-shazam-merge:
  Documentation: kdump: describe VMCOREINFO export for RISCV64
  RISC-V: Add arch_crash_save_vmcoreinfo support

Link: https://lore.kernel.org/r/20221026144208.373504-1-xianting.tian@linux.alibaba.com


Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>