Hello.

    There's no need to check in piix_config_drive_for_dma() for broken MW DMA
mode 0 as this mode is not supported by the driver (it sets hwif->mwdma_mask
to 0x6), and hence can't be selected by ide_dma_speed().

MBR, Sergei

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>