dm: rename device struct to udevice

using UBI and DM together leads in compiler error, as
both define a "struct device", so rename "struct device"
in include/dm/device.h to "struct udevice", as we use
linux code (MTD/UBI/UBIFS some USB code,...) and cannot
change the linux "struct device"

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Marek Vasut <marex@denx.de>
diff --git a/arch/sandbox/include/asm/gpio.h b/arch/sandbox/include/asm/gpio.h
index 95b59da..8317db1 100644
--- a/arch/sandbox/include/asm/gpio.h
+++ b/arch/sandbox/include/asm/gpio.h
@@ -29,7 +29,7 @@
  * @param gp	GPIO number
  * @return -1 on error, 0 if GPIO is low, >0 if high
  */
-int sandbox_gpio_get_value(struct device *dev, unsigned int offset);
+int sandbox_gpio_get_value(struct udevice *dev, unsigned int offset);
 
 /**
  * Set the simulated value of a GPIO (used only in sandbox test code)
@@ -38,7 +38,7 @@
  * @param value	value to set (0 for low, non-zero for high)
  * @return -1 on error, 0 if ok
  */
-int sandbox_gpio_set_value(struct device *dev, unsigned int offset, int value);
+int sandbox_gpio_set_value(struct udevice *dev, unsigned int offset, int value);
 
 /**
  * Return the simulated direction of a GPIO (used only in sandbox test code)
@@ -46,7 +46,7 @@
  * @param gp	GPIO number
  * @return -1 on error, 0 if GPIO is input, >0 if output
  */
-int sandbox_gpio_get_direction(struct device *dev, unsigned int offset);
+int sandbox_gpio_get_direction(struct udevice *dev, unsigned int offset);
 
 /**
  * Set the simulated direction of a GPIO (used only in sandbox test code)
@@ -55,7 +55,7 @@
  * @param output 0 to set as input, 1 to set as output
  * @return -1 on error, 0 if ok
  */
-int sandbox_gpio_set_direction(struct device *dev, unsigned int offset,
+int sandbox_gpio_set_direction(struct udevice *dev, unsigned int offset,
 			       int output);
 
 #endif