oss: remove maui_boot.h from .gitignore and dontdiff

Commit d56b9b9c464a10ab1ee51a4c6190a2b57b8ef7a6 ("The scheduled removal
of some OSS drivers") removed all traces of maui_boot.h from the tree.
Remove its entries in dontdiff and oss's .gitignore file.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Documentation/dontdiff

@@ -163,7 +163,6 @@ mach-types.h
 machtypes.h
 map
 map_hugetlb
-maui_boot.h
 media
 mconf
 miboot*

sound/oss/.gitignore

@@ -1,4 +1,3 @@
 #Ignore generated files
-maui_boot.h
 pss_boot.h
 trix_boot.h