soc: stm32: Remove redudant zephyr_include_directories

soc/arm/st_stm32/CMakeLists.txt already has a
zephyr_include_directories(common) so including in again
soc/arm/st_stm32/common/CMakeLists.txt is redudant.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
1 file changed