platform_get_irq() will call dev_err() itself on failure, so there is no
need for the driver to also do this.  This is detected by coccinelle.

Link: https://lore.kernel.org/r/20191101140058.23212-1-yuehaibing@huawei.comSigned-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>