python/qemu: accel: Fix kvm_available() on ppc64le

On ppc64le, the accel.kvm_available() check may wrongly
return False because the host arch (as returned by os.uname[4])
and the target arch (ppc64) mismatch. In order to solve this
it is added an ppc64le -> ppc64 mapping which is used as an
fallback verification.

Fixes: 53a049d7
Signed-off-by: Wainer dos Santos Moschetta <wainersm@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200205203250.30526-5-wainersm@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>

python/qemu/accel.py

@@ -24,7 +24,8 @@
 # support which often includes its 32 bit cousin.
 ADDITIONAL_ARCHES = {
     "x86_64" : "i386",
-    "aarch64" : "armhf"
+    "aarch64" : "armhf",
+    "ppc64le" : "ppc64",
 }
 
 def list_accel(qemu_bin):