MLK-19722-1 doc: Move device tree bindings documentation to doc/device-tree-bindings

Currently the U-Boot project contains 2 documentation directories:

- doc/
- Documentation/

The Documentation directory only contains device tree bindings related
content, so move the 2 files to doc/device-tree-bindings/.

This commit is based in a previous submission in U-Boot upstream:
http://git.denx.de/?p=u-boot.git;a=commit;h=ad7061ed742e1312289644268859a0f4b512aaee

Signed-off-by: Breno Lima <breno.lima@nxp.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/doc/device-tree-bindings/phy/no-op.txt b/doc/device-tree-bindings/phy/no-op.txt
new file mode 100644
index 00000000000..a3381122e68
--- /dev/null
+++ b/doc/device-tree-bindings/phy/no-op.txt
@@ -0,0 +1,16 @@
+NOP PHY driver
+
+This driver is used to stub PHY operations in a driver (USB, SATA).
+This is useful when the 'client' driver (USB, SATA, ...) uses the PHY framework
+and there is no actual PHY harwdare to drive.
+
+Required properties:
+- compatible     : must contain "nop-phy"
+- #phy-cells     : must contain <0>
+
+Example:
+
+nop_phy {
+	compatible = "nop-phy";
+	#phy-cells = <0>;
+};