[minios] Fix test application link when pcifront is not enabled

[Samuel Thibault <samuel.thibault@ens-lyon.org>]

When pcifront is not enabled, the test application needs to disable the
PCI test.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

diff -r 321f8487379b extras/mini-os/test.c
--- a/extras/mini-os/test.c	Thu Nov 15 10:25:29 2012 +0000
+++ b/extras/mini-os/test.c	Wed Nov 28 21:27:22 2012 +0100
@@ -413,6 +413,7 @@
     }
 }
 
+#ifdef CONFIG_PCIFRONT
 static struct pcifront_dev *pci_dev;
 
 static void print_pcidev(unsigned int domain, unsigned int bus, unsigned int slot, unsigned int fun)
@@ -436,6 +437,7 @@
     printk("PCI devices:\n");
     pcifront_scan(pci_dev, print_pcidev);
 }
+#endif
 
 int app_main(start_info_t *si)
 {
@@ -446,7 +448,9 @@
     create_thread("blkfront", blkfront_thread, si);
     create_thread("fbfront", fbfront_thread, si);
     create_thread("kbdfront", kbdfront_thread, si);
+#ifdef CONFIG_PCIFRONT
     create_thread("pcifront", pcifront_thread, si);
+#endif
     return 0;
 }
 
@@ -464,6 +468,8 @@
     if (kbd_dev)
         shutdown_kbdfront(kbd_dev);
 
+#ifdef CONFIG_PCIFRONT
     if (pci_dev)
         shutdown_pcifront(pci_dev);
+#endif
 }