[libata] PATA drivers: remove ATA_FLAG_SRST

This flag only has meaning in old-EH drivers, and these drivers have
already been converted to the new EH.  Remove.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/pata_icside.c b/drivers/ata/pata_icside.c
index c791a46..321d98b 100644
--- a/drivers/ata/pata_icside.c
+++ b/drivers/ata/pata_icside.c
@@ -530,7 +530,7 @@
 
 		ap->pio_mask = 0x1f;
 		ap->mwdma_mask = info->mwdma_mask;
-		ap->flags |= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST;
+		ap->flags |= ATA_FLAG_SLAVE_POSS;
 		ap->ops = &pata_icside_port_ops;
 
 		pata_icside_setup_ioaddr(&ap->ioaddr, info->base, info->port[i]);