MIPS: dump_tlb: Dump FrameMask register if exists

The FrameMask register is relevant to the TLB so it should be dumped by
dump_tlb_regs(), however it is only present in certain cores (r10000,
r12000, r14000, r16000). Add dumping of it, conditional upon
current_cpu_type().

Suggested-by: Joshua Kinard <kumba@gentoo.org>
Suggested-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Joshua Kinard <kumba@gentoo.org>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/10724/


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