tpm: Request access to locality 0

The CRB driver has to request access to locality 0. Our QEMU
CRB model will enforce that as well.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
diff --git a/src/hw/tpm_drivers.c b/src/hw/tpm_drivers.c
index bd971f7..e4770b3 100644
--- a/src/hw/tpm_drivers.c
+++ b/src/hw/tpm_drivers.c
@@ -442,6 +442,8 @@
     if (!CONFIG_TCGBIOS)
         return 0;
 
+    writeb(CRB_REG(locty, CRB_REG_LOC_CTRL), 1);
+
     return 0;
 }