Spansion s25fl512s supports Quad SPI transfers, hence set the
M25P80_QUAD_READ flag.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>