drivers: serial: Add missing FE310 UART driver reference to CMakeLists
drivers: serial: Add missing FE310 UART driver reference to CMakeLists

This commit adds a missing reference to uart_fe310.c to CMakeLists.txt.

Signed-off-by: Peter Gielda <bce8eab50d93cefbf1a76657d9e40430cc7e86b1@antmicro.com>

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