[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_oldpiix.c b/drivers/ata/pata_oldpiix.c
index 29c23dd..091a70a 100644
--- a/drivers/ata/pata_oldpiix.c
+++ b/drivers/ata/pata_oldpiix.c
@@ -291,7 +291,7 @@
 	static int printed_version;
 	static const struct ata_port_info info = {
 		.sht		= &oldpiix_sht,
-		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
+		.flags		= ATA_FLAG_SLAVE_POSS,
 		.pio_mask	= 0x1f,	/* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma1-2 */
 		.port_ops	= &oldpiix_pata_ops,