net: Don't enable SLIP driver if Bluetooth is enabled
net: Don't enable SLIP driver if Bluetooth is enabled

In case the application is using NET_L2_BLUETOOTH the SLIP drivr shall
not be selected as bus they cannot coexist since they use the same UART
port:

arch/x86/soc/ia32/Kconfig.defconfig:

config BLUETOOTH_UART_ON_DEV_NAME
        default "UART_1"

config UART_PIPE_ON_DEV_NAME
        default "UART_1"

Signed-off-by: Luiz Augusto von Dentz <8530c5ea66a1bdbc08f98bfcf183c8be901b5990@intel.com>

nashif/zephyr,ldts/zephyr,GiulianoFranchetto/zephyr,runchip/zephyr-cc3220,finikorg/zephyr,fbsder/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,Vudentz/zephyr,runchip/zephyr-cc3220,mbolivar/zephyr,finikorg/zephyr,zephyriot/zephyr,fbsder/zephyr,explora26/zephyr,fbsder/zephyr,ldts/zephyr,explora26/zephyr,Vudentz/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,zephyriot/zephyr,galak/zephyr,runchip/zephyr-cc3220,aceofall/zephyr-iotos,mbolivar/zephyr,finikorg/zephyr,nashif/zephyr,punitvara/zephyr,ldts/zephyr,fbsder/zephyr,aceofall/zephyr-iotos,galak/zephyr,runchip/zephyr-cc3220,GiulianoFranchetto/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,rsalveti/zephyr,punitvara/zephyr,nashif/zephyr,kraj/zephyr,mbolivar/zephyr,zephyriot/zephyr,kraj/zephyr,galak/zephyr,ldts/zephyr,rsalveti/zephyr,galak/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,Vudentz/zephyr,galak/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,aceofall/zephyr-iotos,kraj/zephyr,nashif/zephyr,rsalveti/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,rsalveti/zephyr,GiulianoFranchetto/zephyr,zephyriot/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,kraj/zephyr,aceofall/zephyr-iotos,fbsder/zephyr,explora26/zephyr,aceofall/zephyr-iotos,Vudentz/zephyr,Vudentz/zephyr,nashif/zephyr,rsalveti/zephyr,mbolivar/zephyr,mbolivar/zephyr,runchip/zephyr-cc3220,Vudentz/zephyr