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/include/compiler.h

@@ -26,5 +26,6 @@
 #define __always_unused __attribute__((unused))
 #define __must_check __attribute__((warn_unused_result))
 #define __weak __attribute__((weak))
+#define __noreturn __attribute__((noreturn))
 
 #endif

src/include/console/console.h

@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <rules.h>
 #include <arch/cpu.h>
+#include <compiler.h>
 #include <console/post_codes.h>
 #include <commonlib/loglevel.h>
 
@@ -40,7 +41,7 @@ void post_log_clear(void);
 #endif
 /* this function is weak and can be overridden by a mainboard function. */
 void mainboard_post(u8 value);
-void __attribute__((noreturn)) die(const char *msg);
+void __noreturn die(const char *msg);
 
 /*
  * This function is weak and can be overridden to provide additional

src/include/halt.h

@@ -20,10 +20,11 @@
 #ifdef __ROMCC__
 #include <lib/halt.c>
 #else
+#include <compiler.h>
 /**
  * halt the system reliably
  */
-void __attribute__((noreturn)) halt(void);
+void __noreturn halt(void);
 #endif /* __ROMCC__ */
 
 /* Power off the system. */

src/include/reset.h

@@ -1,14 +1,16 @@
 #ifndef RESET_H
 #define RESET_H
 
+#include <compiler.h>
+
 /* Generic reset functions. Call from code that wants to trigger a reset. */
 
 /* Super-hard reset specific to some Intel SoCs. */
-__attribute__((noreturn)) void global_reset(void);
+__noreturn void global_reset(void);
 /* Full board reset. Resets SoC and most/all board components (e.g. DRAM). */
-__attribute__((noreturn)) void hard_reset(void);
+__noreturn void hard_reset(void);
 /* Board reset. Resets SoC some board components (e.g. TPM but not DRAM). */
-__attribute__((noreturn)) void soft_reset(void);
+__noreturn void soft_reset(void);
 
 /* Reset implementations. Implement these in SoC or mainboard code. Implement
    at least hard_reset() if possible, others fall back to it if necessary. */