boards/usb_kw24d512: Cleaning up defconfig
boards/usb_kw24d512: Cleaning up defconfig

Old reference on driver's specific raw mode was still lurking around.
Removing those.

Signed-off-by: Tomasz Bursztyka <ba81a3a719836727e6857ae83462b9f52ec41006@linux.intel.com>

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