libata: release prep (bump versions, etc.)

- bump versions where necessary
- remove two duplicated+outdated doc comments
- add MODULE_VERSION() to AHCI driver
diff --git a/drivers/scsi/ata_piix.c b/drivers/scsi/ata_piix.c
index a2cfade..d96ebf9 100644
--- a/drivers/scsi/ata_piix.c
+++ b/drivers/scsi/ata_piix.c
@@ -32,7 +32,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"ata_piix"
-#define DRV_VERSION	"1.03"
+#define DRV_VERSION	"1.04"
 
 enum {
 	PIIX_IOCFG		= 0x54, /* IDE I/O configuration register */