boards: dts: remove CONFIG_BT checking
boards: dts: remove CONFIG_BT checking

No need to check for BT being enabled. The UART entries will be
available for use if BT is enabled and will do nothing if not.

Signed-off-by: Anas Nashif <0d9952ec84ac43c159f6b7e7ed99a9080c00dd6e@intel.com>

finikorg/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,galak/zephyr,ldts/zephyr,punitvara/zephyr,nashif/zephyr,Vudentz/zephyr,nashif/zephyr,explora26/zephyr,nashif/zephyr,Vudentz/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,Vudentz/zephyr,ldts/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,nashif/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,punitvara/zephyr,ldts/zephyr,punitvara/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,explora26/zephyr,punitvara/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,explora26/zephyr