ARM: dts: AM43xx: add tscadc DT entries for am437x-evm and am43x-epos-evm

This patch adds tscadc DT entries for am437x-gp-evm
and am43x-epos-evm.

Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts
index e7ac47f..2ffd6d6 100644
--- a/arch/arm/boot/dts/am437x-gp-evm.dts
+++ b/arch/arm/boot/dts/am437x-gp-evm.dts
@@ -343,6 +343,14 @@
 	status = "okay";
 };
 
+&tscadc {
+	status = "okay";
+
+	adc {
+		ti,adc-channels = <0 1 2 3 4 5 6 7>;
+	};
+};
+
 &ecap0 {
 	status = "okay";
 	pinctrl-names = "default";