target-ppc: Remove unnecessary variable

Compress lines and remove the variable.

Signed-off-by: Shraddha Barke <shraddha.6596@gmail.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

target-ppc/kvm.c

diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index e641680..f8ea783 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -1782,8 +1782,7 @@
 
     ns++;
 
-    retval = atoi(ns);
-    return retval;
+    return atoi(ns);
 }
 
 bool kvmppc_get_host_serial(char **value)