fix, hygiene, PEBKAC, only define m62 opers over m30_t if m30.h has been included

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'code/hygiene' into next

* code/hygiene:
  fix, hygiene, PEBKAC, only define m62 opers over m30_t if m30.h has been included
Merge branch 'next'

* next:
  fix, hygiene, PEBKAC, only define m62 opers over m30_t if m30.h has been included