vTPM: fix searching for the right vTPM node in device tree

Replace all occurrences of '/ibm,vtpm' with '/vdevice/vtpm',
as only the latter is guanranteed to be available for the client OS.
The '/ibm,vtpm' node should only be used by Open Firmware, which
is susceptible to changes.
Signed-off-by: Hon Ching(Vicky) Lo <honclo@linux.vnet.ibm.com>
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>

arch/powerpc/kernel/prom_init.c

@@ -1430,12 +1430,12 @@ static void __init prom_instantiate_sml(void)
 
 	prom_debug("prom_instantiate_sml: start...\n");
 
-	ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/ibm,vtpm"));
+	ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
 	prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
 	if (!PHANDLE_VALID(ibmvtpm_node))
 		return;
 
-	ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/ibm,vtpm"));
+	ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
 	if (!IHANDLE_VALID(ibmvtpm_inst)) {
 		prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
 		return;
@@ -1464,9 +1464,9 @@ static void __init prom_instantiate_sml(void)
 
 	reserve_mem(base, size);
 
-	prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-base",
+	prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
 		     &base, sizeof(base));
-	prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-size",
+	prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
 		     &size, sizeof(size));
 
 	prom_debug("sml base     = 0x%x\n", base);

drivers/char/tpm/tpm_of.c

@@ -31,7 +31,7 @@ int read_log(struct tpm_bios_log *log)
 		return -EFAULT;
 	}
 
-	np = of_find_node_by_name(NULL, "ibm,vtpm");
+	np = of_find_node_by_name(NULL, "vtpm");
 	if (!np) {
 		pr_err("%s: ERROR - IBMVTPM not supported\n", __func__);
 		return -ENODEV;