ARM: DTS: da850: add DT node for tps6507x-ts

add tps6507x touchscreen device tree node information to
DA850 EVM

Signed-off-by: Sushaanth Srirangapathi <sushaanth.s@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
index f2e7609..9bfcd32 100644
--- a/arch/arm/boot/dts/da850-evm.dts
+++ b/arch/arm/boot/dts/da850-evm.dts
@@ -383,6 +383,9 @@
 			regulator-boot-on;
 		};
 	};
+	touchscreen {
+		ti,min-pressure = <0x30>;
+	};
 };
 
 &mcasp0 {