[MIPS] Transform old-style macros to newer "__noreturn"

Convert old/obsolete NORET_TYPE and ATTRIB_NORET macros to use the
newer standard of "__noreturn" as defined in compiler-gcc.h.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/dec/reset.c b/arch/mips/dec/reset.c
index 5639722..c15a879 100644
--- a/arch/mips/dec/reset.c
+++ b/arch/mips/dec/reset.c
@@ -9,26 +9,26 @@
 
 #include <asm/addrspace.h>
 
-typedef void ATTRIB_NORET (* noret_func_t)(void);
+typedef void __noreturn (* noret_func_t)(void);
 
-static inline void ATTRIB_NORET back_to_prom(void)
+static inline void __noreturn back_to_prom(void)
 {
 	noret_func_t func = (void *)CKSEG1ADDR(0x1fc00000);
 
 	func();
 }
 
-void ATTRIB_NORET dec_machine_restart(char *command)
+void __noreturn dec_machine_restart(char *command)
 {
 	back_to_prom();
 }
 
-void ATTRIB_NORET dec_machine_halt(void)
+void __noreturn dec_machine_halt(void)
 {
 	back_to_prom();
 }
 
-void ATTRIB_NORET dec_machine_power_off(void)
+void __noreturn dec_machine_power_off(void)
 {
     /* DECstations don't have a software power switch */
 	back_to_prom();