msm: kgsl: Add KGSL_PROP_QUERY_CAPABILITIES

Add a new property to query the capabilities of the kernel. The first
supported query type will return a list of property IDs that the kernel
driver supports.

Change-Id: Ic0dedbadba2f6af6c9d1c4d46cb11e3bb74b0028
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>