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/drivers/firmware/psci.c b/drivers/firmware/psci.c
index c8c47ac..394f30f 100644
--- a/drivers/firmware/psci.c
+++ b/drivers/firmware/psci.c
@@ -8,6 +8,7 @@
 
 #include <common.h>
 #include <dm.h>
+#include <irq_func.h>
 #include <dm/lists.h>
 #include <efi_loader.h>
 #include <linux/libfdt.h>