SCSI: Fix Bug 3753 (multiple definition of ST_partstat)

Fix a missed piece of junk from a typedef conversion in st.h
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/st.h

@@ -67,7 +67,7 @@ struct st_partstat {
 	u32 last_block_visited;
 	int drv_block;		/* The block where the drive head is */
 	int drv_file;
-} ST_partstat;
+};
 
 #define ST_NBR_PARTITIONS 4