dma-mapping: fix return type of dma_set_max_seg_size()

dma-mapping: fix return type of dma_set_max_seg_size()

BugLink: https://bugs.launchpad.net/bugs/1857158
[ Upstream commit c9d76d0655c06b8c1f944e46c4fd9e9cf4b331c0 ]

The function dma_set_max_seg_size() can return either 0 on success or
-EIO on error. Change its return type from unsigned int to int to
capture this.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>