staging: axis-fifo: remove redundant dev_err call

devm_ioremap_resource() prints error message in itself. Remove the
dev_err call to avoid redundant error message.

Signed-off-by: Muhammad Usama Anjum <musamaanjum@gmail.com>
Link: https://lore.kernel.org/r/20210407161202.GA1505056@LEGION


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>