dt-bindings: phy: bindings document for common Broadcom SATA3 PHY driver

This patch:
1. Renames DT bindings document of Broadcom STB SATA3 PHY driver to
common Broadcom SATA3 PHY driver bindings document
2. Adds bindings info for NS2 SATA3 PHY
Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Documentation/devicetree/bindings/phy/brcm,brcmstb-sata-phy.txt → Documentation/devicetree/bindings/phy/brcm-sata-phy.txt

-* Broadcom SATA3 PHY for STB
+* Broadcom SATA3 PHY
 
 Required properties:
 - compatible: should be one or more of
      "brcm,bcm7425-sata-phy"
      "brcm,bcm7445-sata-phy"
+     "brcm,iproc-ns2-sata-phy"
      "brcm,phy-sata3"
 - address-cells: should be 1
 - size-cells: should be 0
-- reg: register range for the PHY PCB interface
-- reg-names: should be "phy"
+- reg: register ranges for the PHY PCB interface
+- reg-names: should be "phy" and "phy-ctrl"
+     The "phy-ctrl" registers are only required for
+     "brcm,iproc-ns2-sata-phy".
 
 Sub-nodes:
   Each port's PHY should be represented as a sub-node.
@@ -16,12 +19,12 @@ Sub-nodes:
 Sub-nodes required properties:
 - reg: the PHY number
 - phy-cells: generic PHY binding; must be 0
-Optional:
-- brcm,enable-ssc: use spread spectrum clocking (SSC) on this port
 
+Sub-nodes optional properties:
+- brcm,enable-ssc: use spread spectrum clocking (SSC) on this port
+     This property is not applicable for "brcm,iproc-ns2-sata-phy".
 
 Example:
-
 	sata-phy@f0458100 {
 		compatible = "brcm,bcm7445-sata-phy", "brcm,phy-sata3";
 		reg = <0xf0458100 0x1e00>, <0xf045804c 0x10>;