Rename light/edison_arduino to light/mraa

Rename light/edison_arduino to light/mraa given that light HAL
is not specific to the Edison platform.

Change-Id: Ic6325e00a0ce9418d44bb23abbe6c831bcc8ca9d
Tracked-On: https://jira01.devtools.intel.com/browse/BP-188
Signed-off-by: Constantin Musca <constantin.musca@intel.com>
1 file changed