ep93xx: fix build of vision_ep93xx.c

Fix build breakage due to the following commits:

Commit bd5f12a24766c1f299def0a78b008d4746f528f2
ARM: 7042/3: mach-ep93xx: break out GPIO driver specifics

Commit 257af9f9725aa8a863b306659208a031135d59e7
ARM: 7041/1: gpio-ep93xx: hookup the to_irq callback in the driver

The vision_ep9307 machine uses the ep93xx build-in gpios and needs to
include <mach/gpio-ep93xx.h> to pickup the defines.

The gpio_to_irq() call is now a callback to the gpio-ep93xx.c driver
and cannot be used as a constant initializer for the .irq member of
struct i2c_board_info.

Signed-off-by: Hartley Sweeten <[e-mail]>
Acked-by: Ryan Mallon <[e-mail]>
Acked-by: Mika Westerberg <[e-mail]>
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/arm/mach-ep93xx/vision_ep9307.c

···
 #include <mach/hardware.h>
 #include <mach/fb.h>
 #include <mach/ep93xx_spi.h>
+#include <mach/gpio-ep93xx.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/map.h>
···
 	}, {
 		I2C_BOARD_INFO("pca9539", 0x74),
 		.platform_data	= &pca953x_74_gpio_data,
-		.irq		= gpio_to_irq(EP93XX_GPIO_LINE_F(7)),
 	}, {
 		I2C_BOARD_INFO("pca9539", 0x75),
 		.platform_data	= &pca953x_75_gpio_data,
···
 	if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
 				"pca9539:74"))
 		pr_warn("cannot request interrupt gpio for pca9539:74\n");
+
+	vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
 
 	ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
 				ARRAY_SIZE(vision_i2c_info));