MIPS: tlbex: Guard tlbmiss_handler_setup_pgd

tlbmiss_handler_setup_pgd* are only referenced when
CONFIG_MIPS_PGD_C0_CONTEXT is defined.
Signed-off-by: NTony Wu <tung7970@gmail.com>
Cc: Jayachandran C. <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5601/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/mm/tlb-funcs.S

@@ -16,10 +16,12 @@
 
 #define FASTPATH_SIZE	128
 
+#ifdef CONFIG_MIPS_PGD_C0_CONTEXT
 LEAF(tlbmiss_handler_setup_pgd)
 	.space		16 * 4
 END(tlbmiss_handler_setup_pgd)
 EXPORT(tlbmiss_handler_setup_pgd_end)
+#endif
 
 LEAF(handle_tlbm)
 	.space		FASTPATH_SIZE * 4