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The report descriptor for EX-G wireless mouse (M-XGL20DLBK) is a bit
different from that for trackball mice such as DEFT. For such mouse, the
current `mouse_button_fixup` cannot be used as is, because it uses
hard-coded indices for a report descriptor.

Add parameters to `mouse_button_fixup` function, in order to support
fixing report descriptors for more models.
Signed-off-by: YOSHIOKA Takuma <lo48576@hard-wi.red>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>