device: add DEVICE_DT_GET_ONE macro

Add DEVICE_DT_GET_ONE() macro. This macro is similar to
DEVICE_DT_GET_ANY() but instead of returning NULL if no enabled,
compatible device instance is found, it throws a compilation error.

This is useful for compile-time checks in samples.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>

Author: henrikbrixandersen

include/device.h

@@ -277,6 +277,29 @@ typedef int16_t device_handle_t;
 		    (DEVICE_DT_GET(DT_COMPAT_GET_ANY_STATUS_OKAY(compat))), \
 		    (NULL))
 
+/**
+ * @def DEVICE_DT_GET_ONE
+ *
+ * @brief Obtain a pointer to a device object by devicetree compatible
+ *
+ * If any enabled devicetree node has the given compatible and a
+ * device object was created from it, this returns that device.
+ *
+ * If there no such devices, this throws a compilation error.
+ *
+ * If there are multiple, this returns an arbitrary one.
+ *
+ * If this returns non-NULL, the device must be checked for readiness
+ * before use, e.g. with device_is_ready().
+ *
+ * @param compat lowercase-and-underscores devicetree compatible
+ * @return a pointer to a device
+ */
+#define DEVICE_DT_GET_ONE(compat)					    \
+	COND_CODE_1(DT_HAS_COMPAT_STATUS_OKAY(compat),			    \
+		    (DEVICE_DT_GET(DT_COMPAT_GET_ANY_STATUS_OKAY(compat))), \
+		    (ZERO_OR_COMPILE_ERROR(0)))
+
 /**
  * @def DEVICE_GET
  *