Second set of RISC-V updates for v5.5-rc1

A few minor RISC-V updates for v5.5-rc1 that arrived late.

New features:

- Dump some kernel virtual memory map details to the console if
  CONFIG_DEBUG_VM is enabled

Other improvements:

- Enable more debugging options in the primary defconfigs

Cleanups:

- Clean up Kconfig indentation
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