media: rc: Add support to decode Samsung remote IR protocol

Samsung remote is using NECx IR protocol to send remote control key
events. Present nec decoder in rc framework is assuming to have 2 stop
bits (pulse width of 560us & space width 5600us) in NECx, but in
reality NECx sends only pulse of 560us and space untill next frame.So
here we can ignore the space width in stop bit as it is variable.

CRs-Fixed: 359885
Change-Id: I297343b22039a9a4b899ec945a8b103390dcca13
Signed-off-by: Ravi Kumar V <kumarrav@codeaurora.org>