The common igen code provides the same misc APIs as the ppc version,
so delete the ppc code and pull in the common one. There is one
minor difference: the ppc code has a unique dumpf function. The
common code switched to lf_printf for the same functionality, but
since that requires changes throughout the igen codebase, delay that
cleanup for now so we can merge the rest.
This commit is a follow on to:
commit 182421c9d2
Date: Tue Oct 11 15:02:08 2022 +0100
sim/ppc: fixes for arguments to printf style functions
where commit 182421c9d2 addressed issues with printf format
arguments that were causing the compiler to give an error, this commit
addresses issues that caused the compiler to emit a warning.
This commit is mostly either changing the format string to match the
argument, or in some cases, excess, unused arguments are removed.
