gpio: Handle stmpe-gpio platform data with no gpio base

This patch removes the requirement that gpio base be supplied in
platform data.

Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/gpio/stmpe-gpio.c

@@ -291,8 +291,6 @@ static int __devinit stmpe_gpio_probe(struct platform_device *pdev)
 	int irq;
 
 	pdata = stmpe->pdata->gpio;
-	if (!pdata)
-		return -ENODEV;
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)