ARM: 7074/1: gpio: davinci: eliminate unused variable warnings

Since commit 5093aec872e5be7a55d8dd2b639e8a3818dc19db
"arm: davinci: Cleanup irq chip code", the variable 'mask' and 'g'
are not being used.

This patch eliminate below unused variable warnings:

  CC      drivers/gpio/gpio-davinci.o
drivers/gpio/gpio-davinci.c: In function 'gpio_irq_type':
drivers/gpio/gpio-davinci.c:234: warning: unused variable 'mask'
drivers/gpio/gpio-davinci.c:233: warning: unused variable 'g'

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/gpio/gpio-davinci.c

@@ -230,9 +230,6 @@ static void gpio_irq_enable(struct irq_data *d)
 
 static int gpio_irq_type(struct irq_data *d, unsigned trigger)
 {
-	struct davinci_gpio_regs __iomem *g = irq2regs(d->irq);
-	u32 mask = (u32) irq_data_get_irq_handler_data(d);
-
 	if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
 		return -EINVAL;