powerpc/math_emu/efp: Look for errata handler when type mismatches

We already have cpu a005 errata handler when instruction cannot be
recognized.  Before we lookup the inst, there's type checking, and we also
need to handle it in errata handler when the type checking failed.

Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>