build warning in drivers/macintosh/rack-meter.c

Hi all,

These warnings have beeen around for a while now;

drivers/macintosh/rack-meter.c:157:2: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
  memset(rdma->buf1, 0, ARRAY_SIZE(rdma->buf1));
  ^~~~~~
drivers/macintosh/rack-meter.c:158:2: warning: 'memset' used with length equal to number of elements without multiplication by element size [-Wmemset-elt-size]
  memset(rdma->buf2, 0, ARRAY_SIZE(rdma->buf2));
  ^~~~~~

Introduced by commit

  4f7bef7a9f69 ("drivers: macintosh: rack-meter: fix bogus memsets")

I guess updating to a newer compiler has started generating these.

-- 
Cheers,
Stephen Rothwell