Fix handling of MED effect FFF

Issue an key cut event if MED effect FFF is found. Fixes MED.HC Under Control
position 0x2e. Reported by Sami Jumppanen.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Fix MED finetune effect parameter

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Update changelog

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
[test] Update MMD test data after finetune fix

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>