[ARM] 5298/1: Drop desc_handle_irq()

desc_handle_irq() was declared as obsolete since long ago.
Replace it with generic_handle_irq()

Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c
index 8392d5b..94c2f96 100644
--- a/arch/arm/mach-at91/gpio.c
+++ b/arch/arm/mach-at91/gpio.c
@@ -404,7 +404,6 @@
 		}
 
 		pin = bank->chipbase;
-		gpio = &irq_desc[pin];
 
 		while (isr) {
 			if (isr & 1) {
@@ -417,7 +416,7 @@
 					gpio_irq_mask(pin);
 				}
 				else
-					desc_handle_irq(pin, gpio);
+					generic_handle_irq(pin);
 			}
 			pin++;
 			gpio++;