Canonicalize hostarch name ppc64le to ppc64

See bnc#894956

Index: libvirt-8.3.0/src/util/virarch.c
===================================================================
--- libvirt-8.3.0.orig/src/util/virarch.c
+++ libvirt-8.3.0/src/util/virarch.c
@@ -222,6 +222,8 @@ virArch virArchFromHost(void)
         arch = VIR_ARCH_X86_64;
     } else if (STREQ(ut.machine, "arm64")) {
         arch = VIR_ARCH_AARCH64;
+    } else if (STREQ(ut.machine, "ppc64le")) {
+        arch = VIR_ARCH_PPC64;
     } else {
         /* Otherwise assume the canonical name */
         if ((arch = virArchFromString(ut.machine)) == VIR_ARCH_NONE) {