Move include and source files to logical locations

Move almost all system include files to a logical sub-directory
under ./include. The only remaining system include directories
not under ./include are specific to the platform. Move the
corresponding source files to match the include directory
structure.

Also remove pm.h as it is no longer used.

Change-Id: Ie5ea6368ec5fad459f3e8a802ad129135527f0b3

include/bl_common.h → include/common/bl_common.h

@@ -134,7 +134,10 @@ extern void init_bl31_mem_layout(const meminfo *,
 				meminfo *,
 				unsigned int) __attribute__((weak));
 extern unsigned long image_size(const char *);
-extern unsigned long load_image(meminfo *, const char *, unsigned int, unsigned long);
+extern unsigned long load_image(meminfo *,
+				const char *,
+				unsigned int,
+				unsigned long);
 extern void __dead2 run_image(unsigned long entrypoint,
 				unsigned long spsr,
 				unsigned long security_state,