zephyr: cleanup flash driver name

The flash driver name was changed upstream during the v1.11
development cycle. Remove a shim which kept the old name around in the
Zephyr port now that v1.11 is out.

Signed-off-by: Marti Bolivar <marti@opensourcefoundries.com>
diff --git a/boot/zephyr/targets/arduino_101.h b/boot/zephyr/targets/arduino_101.h
index 2a97268..19095b3 100644
--- a/boot/zephyr/targets/arduino_101.h
+++ b/boot/zephyr/targets/arduino_101.h
@@ -27,7 +27,7 @@
  * In this configuration MCUboot will live at 0x40010000
  */
 
-#define FLASH_DRIVER_NAME		CONFIG_SOC_FLASH_QMSI_DEV_NAME
+#define FLASH_DEV_NAME			CONFIG_SOC_FLASH_QMSI_DEV_NAME
 #define FLASH_ALIGN			4
 #define FLASH_AREA_IMAGE_0_OFFSET	0x40020000
 #define FLASH_AREA_IMAGE_0_SIZE		0x10000