fix build error in gpio-dwapb patch

fix build error with this message:
kernel/irq/Kconfig:41:error: recursive dependency detected!
kernel/irq/Kconfig:41:  symbol GENERIC_IRQ_CHIP is selected by GPIO_DWAPB
drivers/gpio/Kconfig:131:       symbol GPIO_DWAPB depends on IRQ_DOMAIN
kernel/irq/Kconfig:46:  symbol IRQ_DOMAIN is selected by GENERIC_IRQ_CHIP

Signed-off-by: Alan Tull <atull@altera.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index b56bd0c..4d5096e 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -132,7 +132,7 @@
 	tristate "Synopsys DesignWare APB GPIO driver"
 	select GPIO_GENERIC
 	select GENERIC_IRQ_CHIP
-	depends on OF_GPIO && IRQ_DOMAIN
+	depends on OF_GPIO
 	help
 	  Say Y or M here to build support for the Synopsys DesignWare APB
 	  GPIO block.