libata: reorder HSM_ST_FIRST for easier decoding (take 3)

patch 1/4:
  Reorder HSM_ST_FIRST, such that the task state transition is easier decoded with human eyes.
Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

include/linux/libata.h

@@ -315,11 +315,11 @@ enum {
 
 enum hsm_task_states {
 	HSM_ST_IDLE,		/* no command on going */
+	HSM_ST_FIRST,		/* (waiting the device to)
+				   write CDB or first data block */
 	HSM_ST,			/* (waiting the device to) transfer data */
 	HSM_ST_LAST,		/* (waiting the device to) complete command */
 	HSM_ST_ERR,		/* error */
-	HSM_ST_FIRST,		/* (waiting the device to)
-				   write CDB or first data block */
 };
 
 enum ata_completion_errors {