[MIPS] Make facility to convert CPU types to strings generally available.

So far /proc/cpuinfo has been the only user but human readable processor
name are more useful than that for proc.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -295,7 +295,8 @@ void show_regs(struct pt_regs *regs)
 	if (1 <= cause && cause <= 5)
 		printk("BadVA : %0*lx\n", field, regs->cp0_badvaddr);
 
-	printk("PrId  : %08x\n", read_c0_prid());
+	printk("PrId  : %08x (%s)\n", read_c0_prid(),
+	       cpu_name_string());
 }
 
 void show_registers(struct pt_regs *regs)