Rename the function named lcd_dt_simplefb* to fdt_simplefb* to be aligned
with the associated file name fdt_simplefb.h/fdt_simplefb.c
[Backport of commit fded97adce ("common: rename functions lcd_dt_simplefb to fdt_simplefb")]
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Matthias Brugger <mbrugger@suse.com>
Change-Id: I2e93578115e732921ff501244e6cc2c2d2bb2b53