irqchip: Remove asmlinkage from static functions

LTO patches add __visible to the asmlinkage define, causing
compilation warnings like:

  drivers/irqchip/irq-gic.c:283:1: warning: 'externally_visible'
  attribute have effect only on public objects [-Wattributes]

Drop asmlinkage here to avoid such warnings.

Reported-by: Olof's autobuilder <build@lixom.net>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: khilman@linaro.org
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Josh Cartwright <joshc@codeaurora.org>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1393980030-17770-1-git-send-email-sboyd@codeaurora.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/drivers/irqchip/irq-vt8500.c b/drivers/irqchip/irq-vt8500.c
index 1846e7d..eb6e91e 100644
--- a/drivers/irqchip/irq-vt8500.c
+++ b/drivers/irqchip/irq-vt8500.c
@@ -178,8 +178,7 @@
 	.xlate = irq_domain_xlate_onecell,
 };
 
-static asmlinkage
-void __exception_irq_entry vt8500_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry vt8500_handle_irq(struct pt_regs *regs)
 {
 	u32 stat, i;
 	int irqnr, virq;