reduce the amount of boot-time printing

Reference: /n/atom/patch/applied/mmuquiet
Date: Fri Sep 18 14:47:18 CES 2015
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/mmu.c	Fri Sep 18 14:47:09 2015
+++ /sys/src/nix/k10/mmu.c	Fri Sep 18 14:47:11 2015
@@ -62,7 +62,7 @@
 	splx(s);
 
 	if(m->machno == 0)
-		print("pat: %.16llux\n", pat);
+		DBG("pat: %.16llux\n", pat);
 	for(i = 0; i < 64; i += 8)
 		pattab[i>>3] = pat>>i;
 }
@@ -948,8 +948,8 @@
 	sys->vmunused = sys->vmstart + ROUNDUP(PADDR(end), BIGPGSZ);
 	sys->vmunmapped = sys->vmstart + INIMAP;
 
-	print("pmstart %#P pmend %#P\n", sys->pmstart, sys->pmend);
-	print("mmuinit: vmstart %#p vmunused %#p vmunmapped %#p vmend %#p\n",
+	DBG("pmstart %#P pmend %#P\n", sys->pmstart, sys->pmend);
+	DBG("mmuinit: vmstart %#p vmunused %#p vmunmapped %#p vmend %#p\n",
 		sys->vmstart, sys->vmunused, sys->vmunmapped, sys->vmend);
 	if(sys->vmunused > sys->vmunmapped)
 		panic("kernel too big: PADDR(end) > inimap %#P", (uintmem)INIMAP);