This reverts commit6ac9b61786
. This commit was required because at that time, ioread/iowrite functions were sub-optimal on powerpc/32 compared to the architecture specific in_/out_ IO accessors. But there are now equivalent since commit894fa235eb
("powerpc: inline iomap accessors"). Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Li Yang <leoyang.li@nxp.com>