Disable kqemu by default at run time

 -no-kqemu -> -enable-kqemu

kqemu is still present at compile time by default

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/vl.c b/vl.c
index 72c8f6a..50665cf 100644
--- a/vl.c
+++ b/vl.c
@@ -5344,8 +5344,8 @@
                 break;
 #endif
 #ifdef CONFIG_KQEMU
-            case QEMU_OPTION_no_kqemu:
-                kqemu_allowed = 0;
+            case QEMU_OPTION_enable_kqemu:
+                kqemu_allowed = 1;
                 break;
             case QEMU_OPTION_kernel_kqemu:
                 kqemu_allowed = 2;