perf annotate: Add parse function for memory instructions in powerpc

Use the raw instruction code and macros to identify memory instructions,
extract register fields and also offset.

The implementation addresses the D-form, X-form, DS-form instructions.
Two main functions are added.

New parse function "load_store__parse" as instruction ops parser for
memory instructions.

Unlike other parsers (like mov__parse), this one fills in the
"multi_regs" field for source/target and new added "mem_ref" field. No
other fields are set because, here there is no need to parse the
disassembled code and arch specific macros will take care of extracting
offset and regs which is easier and will be precise.

In powerpc, all instructions with a primary opcode from 32 to 63
are memory instructions. Update "ins__find" function to have "raw_insn"
also as a parameter.

Reviewed-by: Kajol Jain <[email protected]>
Reviewed-by: Namhyung Kim <[email protected]>
Signed-off-by: Athira Rajeev <[email protected]>
Tested-by: Kajol Jain <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Akanksha J N <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Disha Goel <[email protected]>
Cc: Hari Bathini <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Segher Boessenkool <[email protected]>
Link: https://lore.kernel.org/lkml/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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