move code to read default config files to a separate function (v2)

Function added to arch_init.c because it depends on arch-specific
settings.

Changes v1 -> v2:
 - Move qemu_read_default_config_file() prototype to qemu-config.h

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/arch_init.c b/arch_init.c
index 9a35aee..4008115 100644
--- a/arch_init.c
+++ b/arch_init.c
@@ -112,6 +112,24 @@
 #define ALL_EQ(v1, v2) ((v1) == (v2))
 #endif
 
+
+int qemu_read_default_config_files(void)
+{
+    int ret;
+    
+    ret = qemu_read_config_file(CONFIG_QEMU_CONFDIR "/qemu.conf");
+    if (ret < 0 && ret != -ENOENT) {
+        return ret;
+    }
+
+    ret = qemu_read_config_file(arch_config_name);
+    if (ret < 0 && ret != -ENOENT) {
+        return ret;
+    }
+
+    return 0;
+}
+
 static int is_dup_page(uint8_t *page)
 {
     VECTYPE *p = (VECTYPE *)page;