[SCSI] Mark some core scsi data structures const

patch below marks a few scsi core datastructures as const, so that they end up
in the .rodata section and don't cacheline share with things that get dirtied

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/st.c

@@ -17,7 +17,7 @@
    Last modified: 18-JAN-1998 Richard Gooch <rgooch@atnf.csiro.au> Devfs support
  */
 
-static char *verstr = "20050830";
+static const char *verstr = "20050830";
 
 #include <linux/module.h>
 
@@ -134,7 +134,7 @@ static struct st_dev_parm {
 #endif
 /* Bit reversed order to get same names for same minors with all
    mode counts */
-static char *st_formats[] = {
+static const char *st_formats[] = {
 	"",  "r", "k", "s", "l", "t", "o", "u",
 	"m", "v", "p", "x", "a", "y", "q", "z"};