Merge branch 'ds/ewah-cleanup'

Remove unused function definitions and declarations from ewah bitmap subsystem. * ds/ewah-cleanup: ewah: delete unused 'rlwit_discharge_empty()' ewah: drop ewah_serialize_native function ewah: drop ewah_deserialize function ewah_io: delete unused 'ewah_serialize()' ewah_bitmap: delete unused 'ewah_or()' ewah_bitmap: delete unused 'ewah_not()' ewah_bitmap: delete unused 'ewah_and_not()' ewah_bitmap: delete unused 'ewah_and()' ewah/bitmap.c: delete unused 'bitmap_each_bit()' ewah/bitmap.c: delete unused 'bitmap_clear()'