ARM: at91/dt: at91-cosino_mega2560 remove useless tsadcc node

The tsadcc node is useless as it doesn't refer to anything and the touchscreen
is handled by the adc0 node.

Signed-off-by: Alexandre Belloni <[e-mail]>
Acked-by: Rodolfo Giometti <[e-mail]>
Signed-off-by: Nicolas Ferre <[e-mail]>

arch/arm/boot/dts/at91-cosino_mega2560.dts

···
 				status = "okay";
 			};
 
-
-			tsadcc: tsadcc@f804c000 {
-				status = "okay";
-			};
-
 			rtc@fffffeb0 {
 				status = "okay";
 			};