sfc: Fix spelling mistake "creationg" -> "creating"

There is a spelling mistake in a pci_warn message. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by:   Alejandro Lucero <alejandro.lucero-palau@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>