improve acpiio messages

Reference: /n/atom/patch/applied2013/acpiiomsg
Date: Thu Dec 26 23:24:29 CET 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/acpiio.c	Thu Dec 26 23:24:23 2013
+++ /sys/src/nix/k10/acpiio.c	Thu Dec 26 23:24:23 2013
@@ -183,11 +183,11 @@
 
 	switch(io->space){
 	default:
-		print("amlmapio: address space %x not implemented\n", io->space);
+		print("amlmapio: address space %d not implemented\n", io->space);
 		break;
 	case MemSpace:
 		if((io->va = vmapoverlap(io->off, io->len)) == nil){
-			print("amlmapio: vmap failed\n");
+			print("amlmapio: vmap failed: [%llux, %llux)\n", io->off, io->off+io->len);
 			break;
 		}
 		io->read = readmem;