complier.h: add __noreturn and use it in code base

Add a __noreturn macro that wraps __attribute__((noreturn)) and replace
current users with the macro.

Change-Id: Iddd0728cf79678c3d1c1f7e7946c27375a644a7d
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/28505
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/drivers/intel/fsp1_0/fsp_util.c

@@ -15,6 +15,7 @@
 
 #include <types.h>
 #include <string.h>
+#include <compiler.h>
 #include <console/console.h>
 #include <bootstate.h>
 #include <cbmem.h>
@@ -66,7 +67,7 @@ void FspNotify (u32 Phase)
  * Call the FSP to do memory init. The FSP doesn't return to this function.
  * The FSP returns to the romstage_main_continue().
  */
-void __attribute__((noreturn)) fsp_early_init (FSP_INFO_HEADER *fsp_ptr)
+void __noreturn fsp_early_init (FSP_INFO_HEADER *fsp_ptr)
 {
 	FSP_FSP_INIT FspInitApi;
 	FSP_INIT_PARAMS FspInitParams;