The last option guarded by this ifdef was removed in commit 68d534201733
("sf: Move SPI flash drivers to defconfig"). Remove the now empty
ifdef/endif block and the associated comment.
Signed-off-by: Chris Packham <judge.packham@gmail.com> Reviewed-by: Stefan Roese <sr@denx.de> Signed-off-by: Stefan Roese <sr@denx.de>