[MIPS] SMTC: Fix duplicate status dumps on NMI

Also removes the while(1); loop by propagating the ATTRIB_NORET of die()
to nmi_exception_handler.
Signed-off-by: NThiemo Seufer <ths@networkno.de>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -1035,19 +1035,11 @@ void ejtag_exception_handler(struct pt_regs *regs)
 /*
  * NMI exception handler.
  */
-void nmi_exception_handler(struct pt_regs *regs)
+NORET_TYPE void ATTRIB_NORET nmi_exception_handler(struct pt_regs *regs)
 {
-#ifdef CONFIG_MIPS_MT_SMTC
-	unsigned long dvpret = dvpe();
 	bust_spinlocks(1);
 	printk("NMI taken!!!!\n");
-	mips_mt_regdump(dvpret);
-#else
-	bust_spinlocks(1);
-	printk("NMI taken!!!!\n");
-#endif /* CONFIG_MIPS_MT_SMTC */
 	die("NMI", regs);
-	while(1) ;
 }
 
 #define VECTORSPACING 0x100	/* for EI/VI mode */