ARM: w1-gpio: fix erroneous gpio requests

Fix regression introduced by commit d2323cf773 ("onewire: w1-gpio: add
ext_pullup_enable pin in platform data") which added a gpio entry to the
platform data, but did not add the required initialisers to the board
files using it. Consequently, the driver would request gpio 0 at probe,
which could break other uses of the corresponding pin.

On AT91 requesting gpio 0 changes the pin muxing for PIOA0, which, for
instance, breaks SPI0 on at91sam9g20.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm/mach-at91/board-foxg20.c

@@ -176,6 +176,7 @@ static struct w1_gpio_platform_data w1_gpio_pdata = {
 	/* If you choose to use a pin other than PB16 it needs to be 3.3V */
 	.pin		= AT91_PIN_PB16,
 	.is_open_drain  = 1,
+	.ext_pullup_enable_pin	= -EINVAL,
 };
 
 static struct platform_device w1_device = {

arch/arm/mach-at91/board-stamp9g20.c

@@ -188,6 +188,7 @@ static struct spi_board_info portuxg20_spi_devices[] = {
 static struct w1_gpio_platform_data w1_gpio_pdata = {
 	.pin		= AT91_PIN_PA29,
 	.is_open_drain	= 1,
+	.ext_pullup_enable_pin	= -EINVAL,
 };
 
 static struct platform_device w1_device = {

arch/arm/mach-ixp4xx/vulcan-setup.c

@@ -163,6 +163,7 @@ static struct platform_device vulcan_max6369 = {
 
 static struct w1_gpio_platform_data vulcan_w1_gpio_pdata = {
 	.pin			= 14,
+	.ext_pullup_enable_pin	= -EINVAL,
 };
 
 static struct platform_device vulcan_w1_gpio = {

arch/arm/mach-pxa/raumfeld.c

@@ -505,6 +505,7 @@ static struct w1_gpio_platform_data w1_gpio_platform_data = {
 	.pin			= GPIO_ONE_WIRE,
 	.is_open_drain		= 0,
 	.enable_external_pullup	= w1_enable_external_pullup,
+	.ext_pullup_enable_pin	= -EINVAL,
 };
 
 struct platform_device raumfeld_w1_gpio_device = {