Tried to minimize actual code modifcations but we got
- several comments/printf messages edited to meet line limits
- occasionally switch some lines to put declarations or printfs in blocks
- couple more places marked TODO or FIXME to avoid non-trivial changes
- fixed PAGE_SIZE define in helpers.h to avoid redeclaration warning
- remove several chunks of dead or commented code
Co-authored-by: Steffen Schulz <steffen.schulz@intel.com>
This introduces generic printf wrappers to replace the various
instances of debug_printf, fprintf, QEMU_PR_PRINTF etc.
Several more hardcoded printf() are still present and should probably be
replaced with nyx_debug_p().
