macintosh: windfarm: remove detatch debug containing spelling mistakes

There are spelling mistakes in two debug messages. As recommended
by Wolfram Sang, these can be removed as there is plenty of debug
in the driver core.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200806102901.44988-1-colin.king@canonical.com