accel/amdxdna: Set default DPM level based on QoS for temporal-only mode

accel/amdxdna: Set default DPM level based on QoS for temporal-only mode

The QoS request provided when creating a hardware context is currently
ignored when operating in temporal-only mode. Change this to use resource
allocation through xrs_allocate_resource(), which sets the default DPM
level according to the QoS request.

When multiple hardware contexts are active, track their required DPM
levels and set the default DPM level to the highest among them.

Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260424040824.2253607-1-lizhi.hou@amd.com