ixus100_sd780: Set KEY_PLAYBACK as default ALT key, remove KEY_POWER from KEYMASK1
ixus105_sd1300: Remove KEY_POWER from KEY_MASK0
a410: simpler loader code, remove autodetected entries from stubs_entry_2.S and stubs_min.S
a550: Simpler loader code, remove autodetected entries from stubs_entry_2.S and stubs_min.S
a420 and a710: Simpler loader code and remove autodetected entries from stubs_entry_2.S and stubs_min.S
a560 and s3is: Simpler loader code and remove autodetected entries from stubs_entry_2.S and stubs_min.S