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-sun4i.c b/drivers/irqchip/irq-sun4i.c
index a5438d8..9fbff03 100644
--- a/drivers/irqchip/irq-sun4i.c
+++ b/drivers/irqchip/irq-sun4i.c
@@ -36,7 +36,7 @@
 static void __iomem *sun4i_irq_base;
 static struct irq_domain *sun4i_irq_domain;
 
-static asmlinkage void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs);
+static void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs);
 
 static void sun4i_irq_ack(struct irq_data *irqd)
 {
@@ -136,7 +136,7 @@
 }
 IRQCHIP_DECLARE(allwinner_sun4i_ic, "allwinner,sun4i-ic", sun4i_of_init);
 
-static asmlinkage void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs)
+static void __exception_irq_entry sun4i_handle_irq(struct pt_regs *regs)
 {
 	u32 irq, hwirq;