MIPS: Introduce board_cache_error_setup() hook.

This is used in subsequent patches.

Signed-off-by: David Daney <[e-mail]>
Cc: [e-mail]
Patchwork: https://patchwork.linux-mips.org/patch/3819/
Signed-off-by: Ralf Baechle <[e-mail]>

arch/mips/include/asm/traps.h

···
 extern void (*board_ejtag_handler_setup)(void);
 extern void (*board_bind_eic_interrupt)(int irq, int regset);
 extern void (*board_ebase_setup)(void);
+extern void (*board_cache_error_setup)(void);
 
 extern int register_nmi_notifier(struct notifier_block *nb);
 

arch/mips/kernel/traps.c

···
 void (*board_ejtag_handler_setup)(void);
 void (*board_bind_eic_interrupt)(int irq, int regset);
 void (*board_ebase_setup)(void);
-
+void __cpuinitdata(*board_cache_error_setup)(void);
 
 static void show_raw_backtrace(unsigned long reg29)
 {
···
 		set_except_vector(25, handle_mt);
 
 	set_except_vector(26, handle_dsp);
+
+	if (board_cache_error_setup)
+		board_cache_error_setup();
 
 	if (cpu_has_vce)
 		/* Special exception: R4[04]00 uses also the divec space. */