This reverts commit dcdc6d9dad.
Even if described this way in the datasheet, it causes a bootloop on a
RT-N56U (v1):
of-flash 1c000000.nor-flash: do_map_probe() failed for type cfi_probe
of-flash 1c000000.nor-flash: do_map_probe() failed
VFS: Cannot open root device “(null)” or unknown-block(0,0): error -6
Fixes: FS#1930
Signed-off-by: Mathias Kresin <dev@kresin.me>