stv0991: remove define CONFIG_OF_SEPARATE from board file

CONFIG_OF_SEPARATE is default define with CONFIG_OF_CONTROL, removing
this define from the board file to avoid multiple definition warning.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Reviewed-by: Jagannadh Teki <jteki@openedev.com>
1 file changed