common: Move enable/disable_interrupts out of common.h

Move these two functions into the irq_funcs.h header file. Also move
interrupt_handler_t as this is used by the irq_install_handler() function.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/include/irq_func.h b/include/irq_func.h
index 11d2bdd..c7c4bab 100644
--- a/include/irq_func.h
+++ b/include/irq_func.h
@@ -9,11 +9,18 @@
 #ifndef __IRQ_FUNC_H
 #define __IRQ_FUNC_H
 
+struct pt_regs;
+
+typedef void (interrupt_handler_t)(void *arg);
+
 int interrupt_init(void);
 void timer_interrupt(struct pt_regs *regs);
 void external_interrupt(struct pt_regs *regs);
-void irq_install_handler (int vec, interrupt_handler_t *handler, void *arg);
+void irq_install_handler(int vec, interrupt_handler_t *handler, void *arg);
 void irq_free_handler(int vec);
 void reset_timer(void);
 
+void enable_interrupts(void);
+int disable_interrupts(void);
+
 #endif