phylib: rename reset-(post-)delay-us to reset-(de)assert-us

As suggested by Rob Herring [1] rename the previously introduced
reset-{,post-}delay-us bindings to the clearer reset-{,de}assert-us

[1] https://patchwork.kernel.org/patch/10104905/

Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index e37c21d..268aad4 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -41,8 +41,8 @@ struct mdio_device {
 	int addr;
 	int flags;
 	struct gpio_desc *reset;
-	unsigned int reset_delay;
-	unsigned int reset_post_delay;
+	unsigned int reset_assert_delay;
+	unsigned int reset_deassert_delay;
 };
 #define to_mdio_device(d) container_of(d, struct mdio_device, dev)