dmaengine: xilinx: xdma: Fix Judgment of the return value

Fix: make IS_ERR() judge the devm_ioremap_resource() function return.

Fixes: 17ce2522

 ("dmaengine: xilinx: xdma: Add xilinx xdma driver")
Signed-off-by: Minjie Du <duminjie@vivo.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20230705113912.16247-1-duminjie@vivo.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>