perf annotate: Introduce alternative method of keeping instructions table

Some arches may want to dynamically populate the table using regular
expressions on the instruction names to associate them with a set of
parsing/formatting/etc functions (struct ins_ops), so provide a fallback
for when the ins__find() method fails.

That fall back will be able to resize the arch->instructions, setting
arch->nr_instructions appropriately, helper functions to associate an
ins_ops to an instruction name, growing the arch->instructions if needed
and resorting it are provided, all the arch specific callback needs to
do is to decide if the missing instruction should be added to
arch->instructions with a ins_ops association.

Reviewed-by: Ravi Bangoria <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Chris Riyder <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kim Phillips <[email protected]>
Cc: Markus Trippelsdorf <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Naveen N. Rao <[email protected]>
Cc: Pawel Moll <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Russell King <[email protected]>
Cc: Taeung Song <[email protected]>
Cc: Wang Nan <[email protected]>
Link: http://lkml.kernel.org/n/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

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