MIPS: traps: Dump the PageGrain and Wired registers on MC

They can be useful to determine how the MMU is configured on a MC
exception.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8401/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/traps.c

@@ -1432,6 +1432,8 @@ asmlinkage void do_mcheck(struct pt_regs *regs)
 		pr_err("EntryHi : %0*lx\n", field, read_c0_entryhi());
 		pr_err("EntryLo0: %0*lx\n", field, read_c0_entrylo0());
 		pr_err("EntryLo1: %0*lx\n", field, read_c0_entrylo1());
+		pr_err("Wired   : %0x\n", read_c0_wired());
+		pr_err("Pagegrain: %0x\n", read_c0_pagegrain());
 		if (cpu_has_htw) {
 			pr_err("PWField : %0*lx\n", field, read_c0_pwfield());
 			pr_err("PWSize  : %0*lx\n", field, read_c0_pwsize());