[libata] Use ATA_UDMAx standard masks when filling driver's udma_mask info

The ATA_UDMAx masks are self-documenting, and far better than manually
writing in the hex mask.

Note that pata_it8213 mask differed from the comment.  Added a FIXME there.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index d2278fd..b0af65a 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -892,7 +892,7 @@
 		.flags = ATA_FLAG_SLAVE_POSS,
 		.pio_mask = 0x1f,
 		.mwdma_mask = 0x07,
-		.udma_mask = 0x3f,
+		.udma_mask = ATA_UDMA5,
 		.port_ops = &hpt370_port_ops
 	};
 	/* HPT370A - UDMA100 */
@@ -901,7 +901,7 @@
 		.flags = ATA_FLAG_SLAVE_POSS,
 		.pio_mask = 0x1f,
 		.mwdma_mask = 0x07,
-		.udma_mask = 0x3f,
+		.udma_mask = ATA_UDMA5,
 		.port_ops = &hpt370a_port_ops
 	};
 	/* HPT370 - UDMA100 */
@@ -928,7 +928,7 @@
 		.flags = ATA_FLAG_SLAVE_POSS,
 		.pio_mask = 0x1f,
 		.mwdma_mask = 0x07,
-		.udma_mask = 0x7f,
+		.udma_mask = ATA_UDMA6,
 		.port_ops = &hpt372_port_ops
 	};
 	/* HPT374 - UDMA100 */
@@ -937,7 +937,7 @@
 		.flags = ATA_FLAG_SLAVE_POSS,
 		.pio_mask = 0x1f,
 		.mwdma_mask = 0x07,
-		.udma_mask = 0x3f,
+		.udma_mask = ATA_UDMA5,
 		.port_ops = &hpt374_port_ops
 	};