[PATCH -next] drm/pl111: Fix return value check in pl111_amba_probe()

[Eric Anholt]

Wei Yongjun <weiyj.lk at gmail.com> writes:

> From: Wei Yongjun <weiyongjun1 at huawei.com>
>
> In case of error, the function devm_ioremap_resource() returns ERR_PTR()
> and never returns NULL. The NULL test in the return value check should
> be replaced with IS_ERR().
>
> Fixes: bed41005e617 ("drm/pl111: Initial drm/kms driver for pl111")
> Signed-off-by: Wei Yongjun <weiyongjun1 at huawei.com>

Reviewed and applied.  Thanks!
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