Introduce clang-format

An automated and opinionated style for code. We can decide to change the
style and have the source updated by the clang-format tool by running:

    make format

I've based the style on the Google style with exceptions to better
match
the current source style.

Change-Id: I43f85c7d4ce02ca999805558b25fcab2e43859c6
diff --git a/inc/fdt.h b/inc/fdt.h
index fcc1716..44d629e 100644
--- a/inc/fdt.h
+++ b/inc/fdt.h
@@ -23,7 +23,7 @@
 bool fdt_read_property(const struct fdt_node *node, const char *name,
 		       const char **buf, uint32_t *size);
 
-void fdt_add_mem_reservation(struct fdt_header *hdr,
-			     uint64_t addr, uint64_t len);
+void fdt_add_mem_reservation(struct fdt_header *hdr, uint64_t addr,
+			     uint64_t len);
 
-#endif  /* _FDT_H */
+#endif /* _FDT_H */