x86: remove various unused subarch hooks

Impact: remove dead code

Remove:

 - pre_setup_arch_hook()
 - mca_nmi_hook()

If needed they can be added back via an x86_quirk handler.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/include/asm/arch_hooks.h

@@ -15,12 +15,12 @@ extern void init_ISA_irqs(void);
 extern irqreturn_t timer_interrupt(int irq, void *dev_id);
 
 /* these are the defined hooks */
-extern void intr_init_hook(void);
 extern void pre_intr_init_hook(void);
-extern void pre_setup_arch_hook(void);
+extern void intr_init_hook(void);
+
 extern void trap_init_hook(void);
+
 extern void pre_time_init_hook(void);
 extern void time_init_hook(void);
-extern void mca_nmi_hook(void);
 
 #endif /* _ASM_X86_ARCH_HOOKS_H */

arch/x86/kernel/mca_32.c

@@ -474,6 +474,4 @@ void __kprobes mca_handle_nmi(void)
 	 * adapter was responsible for the error.
 	 */
 	bus_for_each_dev(&mca_bus_type, NULL, NULL, mca_handle_nmi_callback);
-
-	mca_nmi_hook();
-} /* mca_handle_nmi */
+}

arch/x86/kernel/setup.c

@@ -668,7 +668,6 @@ void __init setup_arch(char **cmdline_p)
 #ifdef CONFIG_X86_32
 	memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
 	visws_early_detect();
-	pre_setup_arch_hook();
 #else
 	printk(KERN_INFO "Command line: %s\n", boot_command_line);
 #endif
@@ -1022,18 +1021,6 @@ void __init intr_init_hook(void)
 	}
 }
 
-/**
- * pre_setup_arch_hook - hook called prior to any setup_arch() execution
- *
- * Description:
- *	generally used to activate any machine specific identification
- *	routines that may be needed before setup_arch() runs.  On Voyager
- *	this is used to get the board revision and type.
- **/
-void __init pre_setup_arch_hook(void)
-{
-}
-
 /**
  * trap_init_hook - initialise system specific traps
  *
@@ -1088,25 +1075,4 @@ void __init time_init_hook(void)
 	irq0.mask = cpumask_of_cpu(0);
 	setup_irq(0, &irq0);
 }
-
-#ifdef CONFIG_MCA
-/**
- * mca_nmi_hook - hook into MCA specific NMI chain
- *
- * Description:
- *	The MCA (Microchannel Architecture) has an NMI chain for NMI sources
- *	along the MCA bus.  Use this to hook into that chain if you will need
- *	it.
- **/
-void mca_nmi_hook(void)
-{
-	/*
-	 * If I recall correctly, there's a whole bunch of other things that
-	 * we can do to check for NMI problems, but that's all I know about
-	 * at the moment.
-	 */
-	pr_warning("NMI generated from unknown source!\n");
-}
-#endif /* CONFIG_MCA */
-
 #endif /* CONFIG_X86_32 */