This converts the following to Kconfig:
CONFIG_LCD_DT_SIMPLEFB
This patch also renames this config to CONFIG_FDT_SIMPLEFB as the code in
common/lcd_simplefb.c support CONFIG_LCD and CONFIG_VIDEO.
[Backport of commit d71587c2ab ("Convert CONFIG_LCD_DT_SIMPLEFB to Kconfig")]
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Matthias Brugger <mbrugger@suse.com>
Change-Id: Ic2828ce2e8227f0aa65b5f3f98b3dcd44d972256