Blackfin: time: replace magic numbers with defines

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

arch/blackfin/kernel/time.c

@@ -51,7 +51,7 @@ void __init setup_core_timer(void)
 	u32 tcount;
 
 	/* power up the timer, but don't enable it just yet */
-	bfin_write_TCNTL(1);
+	bfin_write_TCNTL(TMPWR);
 	CSYNC();
 
 	/* the TSCALE prescaler counter */
@@ -64,7 +64,7 @@ void __init setup_core_timer(void)
 	/* now enable the timer */
 	CSYNC();
 
-	bfin_write_TCNTL(7);
+	bfin_write_TCNTL(TAUTORLD | TMREN | TMPWR);
 }
 #endif