dts: frdmk_64f: Generate UART_PIPE config from device tree

patch adds zephyr,uart-pipe to devie tree as chosen property.
This is added for frdmk64f because sanitycheck test was
breaking with changes of generating configs for UART_PIPE
from device tree instead of Kconfig.

Signed-off-by: Savinay Dharmappa <[email protected]>

Author: SavinayDharmappa

dts/arm/frdm_k64f.dts

@@ -25,6 +25,7 @@
 		zephyr,sram = &sram0;
 		zephyr,flash = &flash0;
 		zephyr,console = &uart0;
+		zephyr,uart-pipe = &uart0;
 	};
 };