debugfs: add FIP device

Add a FIP driver hooked to debugfs 9p interface. This is an
abstraction of the FIP filesystem layer on top of a mass storage,
or memory block driver.

Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
Change-Id: If275ea0824763de43ab666dab2a06de5352ff940
diff --git a/lib/debugfs/devc.c b/lib/debugfs/devc.c
index 13c553d..1099a85 100644
--- a/lib/debugfs/devc.c
+++ b/lib/debugfs/devc.c
@@ -7,9 +7,11 @@
 typedef struct dev dev_t;
 
 extern dev_t rootdevtab;
+extern dev_t fipdevtab;
 
 dev_t *const devtab[] = {
 	&rootdevtab,
+	&fipdevtab,
 	0
 };