accel/ivpu: fix HWS command queue leak on registration failure

accel/ivpu: fix HWS command queue leak on registration failure

A command queue is considered valid and usable by the driver only when
it has a doorbell ID assigned (db_id != 0), meaning both the FW cmdq
creation and doorbell registration completed successfully.

However, when either ivpu_register_db() or set_context_sched_properties()
fails after ivpu_hws_cmdq_init() has already created the cmdq in FW,
the command queue is left registered in FW while the driver treats it as
uninitialized (db_id remains 0). On the next submission attempt the
driver tries to register the same cmdq again, which fails because FW
already has an entry for it.

Fix by calling ivpu_jsm_hws_destroy_cmdq() on error paths to properly
unwind FW state and allow subsequent registration attempts to succeed.

Fixes: 465a3914b254 ("accel/ivpu: Add API for command queue create/destroy/submit")
Reviewed-by: Andrzej Kacprowski <andrzej.kacprowski@linux.intel.com>
Signed-off-by: Karol Wachowski <karol.wachowski@linux.intel.com>
Link: https://patch.msgid.link/20260611055140.948684-1-karol.wachowski@linux.intel.com