software node: remove DEV_PROP_MAX

This definition is not used anywhere, let's remove it.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/include/linux/property.h b/include/linux/property.h
index 0546611..0a075fb 100644
--- a/include/linux/property.h
+++ b/include/linux/property.h
@@ -22,7 +22,6 @@
 	DEV_PROP_U32,
 	DEV_PROP_U64,
 	DEV_PROP_STRING,
-	DEV_PROP_MAX,
 };
 
 enum dev_dma_attr {