[MIPS] Sibyte: Fix M_SCD_TIMER_INIT and M_SCD_TIMER_CNT wrong field width.

    
From Dave Johnson <djohnson+linuxmips@sw.starentnetworks.com>:
    
Field width should be 23 bits not 20 bits.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

include/asm-mips/sibyte/sb1250_scd.h

@@ -359,14 +359,15 @@
  */
 
 #define V_SCD_TIMER_FREQ            1000000
+#define V_SCD_TIMER_WIDTH           23
 
 #define S_SCD_TIMER_INIT            0
-#define M_SCD_TIMER_INIT            _SB_MAKEMASK(20,S_SCD_TIMER_INIT)
+#define M_SCD_TIMER_INIT            _SB_MAKEMASK(V_SCD_TIMER_WIDTH,S_SCD_TIMER_INIT)
 #define V_SCD_TIMER_INIT(x)         _SB_MAKEVALUE(x,S_SCD_TIMER_INIT)
 #define G_SCD_TIMER_INIT(x)         _SB_GETVALUE(x,S_SCD_TIMER_INIT,M_SCD_TIMER_INIT)
 
 #define S_SCD_TIMER_CNT             0
-#define M_SCD_TIMER_CNT             _SB_MAKEMASK(20,S_SCD_TIMER_CNT)
+#define M_SCD_TIMER_CNT             _SB_MAKEMASK(V_SCD_TIMER_WIDTH,S_SCD_TIMER_CNT)
 #define V_SCD_TIMER_CNT(x)         _SB_MAKEVALUE(x,S_SCD_TIMER_CNT)
 #define G_SCD_TIMER_CNT(x)         _SB_GETVALUE(x,S_SCD_TIMER_CNT,M_SCD_TIMER_CNT)