dmaengine: moxart-dma: Drop pointless static qualifier in moxart_probe()

There is no need to have the 'void __iomem *dma_base_addr' variable
static since new value always be assigned before use it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20200505101353.195446-1-yuehaibing@huawei.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>