accel/ivpu: Rename ivpu_log_level to fw_log_level

Rename module param ivpu_log_level to fw_log_level, so it is clear
what log level is actually changed.

Reviewed-by: Maciej Falkowski <maciej.falkowski@linux.intel.com>
Reviewed-by: Jeffrey Hugo <quic_jhugo@quicinc.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240930195322.461209-3-jacek.lawrynowicz@linux.intel.com


Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>