backend-drm: Check for HDCP Content Type property before setting

Currently, a check is missing for the case if the HDCP Content Type
property is requested, but is not supported by the driver.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
2 jobs for hdcp_bug_fix in 1 minute and 22 seconds (queued for 34 seconds)
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Status Job ID Name Coverage
  Container Prep
passed #554855
container_prep

00:00:32

 
  Build
passed #554856
build-native-meson

00:00:50