[ARM] footbridge: add isa_init_irq() to common header

isa_init_irq() is defined in arch/arm/mach-footbridge/isa-irq.c
and used in arch/arm/mach-footbridge/common.c but there is no
definition in any header. Move the definition in common.c to
common.h to stop the sparse warning:

isa-irq.c:118:13: warning: symbol 'isa_init_irq' was not declared.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/arm/mach-footbridge/common.h b/arch/arm/mach-footbridge/common.h
index 580e31bbc711..b05e662d21ad 100644
--- a/arch/arm/mach-footbridge/common.h
+++ b/arch/arm/mach-footbridge/common.h
@@ -7,3 +7,4 @@ extern void isa_rtc_init(void);
 extern void footbridge_map_io(void);
 extern void footbridge_init_irq(void);
 
+extern void isa_init_irq(unsigned int irq);