add cmake RTOS=zephyr (default noos) for zephyr build

hw/bsp/lpc11/family.cmake

@@ -90,7 +90,7 @@ function(family_configure_example TARGET RTOS)
     )
 
   # Add TinyUSB target and port source
-  family_add_tinyusb(${TARGET} OPT_MCU_LPC11UXX ${RTOS})
+  family_add_tinyusb(${TARGET} OPT_MCU_LPC11UXX)
   target_sources(${TARGET}-tinyusb PUBLIC
     ${TOP}/src/portable/nxp/lpc_ip3511/dcd_lpc_ip3511.c
     )