ucm2: Qualcomm: Radxa: fix Displayport SectionDevice

ucm2: Qualcomm: Radxa: fix Displayport SectionDevice

for some reason this ucm endedup using DisplayPort for SectionDevice
instead of HDMI. This was resulting in below failures of any PR against
Qualcomm devices.

Run cd alsa-tests/python/ucm-validator2
./ucm.py configs --level=0 --ucmdir=../../../alsa-ucm-conf/ucm2
./Qualcomm/qcs6490/QCS6490-Radxa-Dragon-Q6A/HiFi.conf: Device name DisplayPort
 /'SectionDevice'.'DisplayPort'/ is not valid
(see https://github.com/alsa-project/alsa-lib/blob/master/include/use-case.h)
total errors: 1
make: *** [Makefile:10: configs] Error 1
Error: Process completed with exit code 2.

Fix this by using known devices from use-case.h

Closes: https://github.com/alsa-project/alsa-ucm-conf/pull/624
Fixes: 67628fb4871e ("ucm2: Qualcomm: add Radxa Dragon Q6A")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@oss.qualcomm.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>