Always use named structs in header files

Add tag names to all unnamed structs in header files. This
allows forward declaration of structs, which is necessary to
reduce header file nesting (to be implemented in a subsequent
commit).

Also change the typedef names across the codebase to use the _t
suffix to be more conformant with the Linux coding style. The
coding style actually prefers us not to use typedefs at all but
this is considered a step too far for Trusted Firmware.

Also change the IO framework structs defintions to use typedef'd
structs to be consistent with the rest of the codebase.

Change-Id: I722b2c86fc0d92e4da3b15e5cab20373dd26786f
diff --git a/include/lib/aarch64/xlat_tables.h b/include/lib/aarch64/xlat_tables.h
index 01b1afe..d7e1c60 100644
--- a/include/lib/aarch64/xlat_tables.h
+++ b/include/lib/aarch64/xlat_tables.h
@@ -49,20 +49,20 @@
 
 	MT_SECURE	= 0 << 2,
 	MT_NS		= 1 << 2
-} mmap_attr;
+} mmap_attr_t;
 
 /*
  * Structure for specifying a single region of memory.
  */
-typedef struct {
+typedef struct mmap_region {
 	unsigned long	base;
 	unsigned long	size;
-	mmap_attr	attr;
-} mmap_region;
+	mmap_attr_t	attr;
+} mmap_region_t;
 
 extern void mmap_add_region(unsigned long base, unsigned long size,
 				unsigned attr);
-extern void mmap_add(const mmap_region *mm);
+extern void mmap_add(const mmap_region_t *mm);
 
 extern void init_xlat_tables(void);