usb/ohci-sm501: remove the HCD_DMA flag

usb/ohci-sm501: remove the HCD_DMA flag

This driver doesn't support normal DMA, only direct access to its
local memory.  Remove the HCD_DMA flag to properly express that fact.

Fixes: 7b81cb6bddd2 ("usb: add a HCD_DMA flag instead of guestimating DMA capabilities")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20190903084615.19161-2-hch@lst.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>