staging: qlge: Fix dma_sync_single calls

Using the unmap addr elsewhere than unmap calls is a misuse of the dma api.
In prevision of this fix, qlge kept two copies of the dma address around ;)

Fixes: c4e84bde ("qlge: New Qlogic 10Gb Ethernet Driver.")
Fixes: 7c734359 ("qlge: Size RX buffers based on MTU.")
Fixes: 2c9a266a ("qlge: Fix receive packets drop.")
Signed-off-by: Benjamin Poirier <bpoirier@suse.com>
Link: https://lore.kernel.org/r/20190927101210.23856-10-bpoirier@suse.com


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