drivers: Kconfig.dw: Remove unnecessary Kconfig
drivers: Kconfig.dw: Remove unnecessary Kconfig

Remove Kconfig which are replaced by dts and unnecessary macros which is
not useful anymore.

Signed-off-by: Punit Vara <2ba5e82aa6fb4e68460f49bedefe3af5717cea9b@intel.com>

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