accel/amdxdna: Add hardware scheduler time quantum support

accel/amdxdna: Add hardware scheduler time quantum support

Add support for configuring the hardware scheduler time quantum to
improve fairness across concurrent contexts.

The scheduler enforces a fixed time slice per context, preventing
long-running workloads from monopolizing the device and allowing
other contexts to make forward progress.

The default time quantum is 30ms and can be configured via the
time_quantum_ms module parameter.

Signed-off-by: Max Zhen <max.zhen@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Signed-off-by: Lizhi Hou <lizhi.hou@amd.com>
Link: https://patch.msgid.link/20260415171139.904947-1-lizhi.hou@amd.com