misc: sgi-gru: Fix spelling mistake "unexpect" -> "unexpected"

There is a spelling mistake in an error message. Fix it.

Acked-by: Dimitri Sivanich <sivanich@hpe.com>
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220315222253.2960047-1-colin.i.king@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>