mtd: pxa3xx_nand: discard wait_for_event,write_cmd,__readid function
Since we have rework the irq process, we don't need additional delay in wait_for_event. Also write_cmd and __readid is also discarded for the same reason. Signed-off-by: Lei Wen <leiwen@marvell.com> Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com> Acked-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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