memory: atmel-ebi: use PTR_ERR_OR_ZERO() to simplify the code
Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR. Generated by coccinelle. Signed-off-by:Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by:
Alexandre Belloni <alexandre.belloni@free-electrons.com>
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