target-ppc: Change "POWER7" CPU alias

Let it resolve to v2.3 rather than v2.0.

Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

target-ppc/translate_init.c

diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index b0d4357..1015077 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -7332,7 +7332,7 @@
     { "Boxer", "POWER3" },
     { "Dino",  "POWER3" },
     { "POWER3+", "631" },
-    { "POWER7", "POWER7_v2.0" },
+    { "POWER7", "POWER7_v2.3" },
     { "970fx", "970fx_v3.1" },
     { "970mp", "970mp_v1.1" },
     { "Apache", "RS64" },