samples: mesh: nrf52: corrected Range status response

As per PTS, IUT is expected to return success for the
Range Get messages (Light Lightness Range Get for
MMDL/SR/LLNS/BI-01-C, Light CTL Temperature Range Get
for MMDL/SR/LCTLS/BI-01-C). This commit take care of
this issue.

Signed-off-by: Vikrant More <vikrant8051@gmail.com>