Those models do not support JPEG encoding.

This patch extends original model list proposed in unmerged upstream PR:

https://gitlab.com/sane-project/backends/-/merge_requests/567/diffs

Refer to https://bugzilla.altlinux.org/show_bug.cgi?id=39729

for details

diff --git a/sane-backends/backend/xerox_mfp.c b/sane-backends/backend/xerox_mfp.c

index fc3d94f..148a9f5 100644

--- a/sane-backends/backend/xerox_mfp.c

+++ b/sane-backends/backend/xerox_mfp.c

@@ -215,6 +215,8 @@ static int isSupportedDevice(struct device __sane_unused__ *dev)

 	    !!strstr(dev->sane.model, "CLX-3170") ||

             !!strstr(dev->sane.model, "4x24") ||

             !!strstr(dev->sane.model, "4x28") ||

+			!!strstr(dev->sane.model, "WorkCentre 3220") ||

+			!!strstr(dev->sane.model, "WorkCentre 3225") ||

 	    !strncmp(dev->sane.model, "M288x", 5))

 	    return 0;

         return 1;