ARM: dts: omap4-sdp: Add keypad data

Add keypad data node in omap4 device tree file.
Also fill the device tree binding parameters
with the required value in "omap4-sdp" dts file.

Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
[b-cousson@ti.com: Re-align the entries and the comments]
diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
index 04cbbcb..7fc45bb 100644
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -295,5 +295,10 @@
 			interrupt-parent = <&gic>;
 			ti,hwmods = "dmic";
 		};
+
+		keypad: keypad@4a31c000 {
+			compatible = "ti,omap4-keypad";
+			ti,hwmods = "kbd";
+		};
 	};
 };