New keycode definitions for HDMI-CEC

Following keys are added to be mapped to HDMI-CEC standard keys:

KEYCODE_MEDIA_TOP_MENU
KEYCODE_11
KEYCODE_12
KEYCODE_LAST_CHANNEL
KEYCODE_TV_DATA_SERVICE

Also updated the information on the key code update by removing
some files not present any more.

Change-Id: I305d9b578c1824f34c457144a68132717dc9a97f