[][kernel][mt7981/mt7986/mt7988][spi][spi-calibration: Fix caldata wrongly freed]

[Description]
Fix caldata wrongly freed.

[Release-log]
N/A

Change-Id: Ic35f7147ecf5a2dca6bdbc1c3d0fc1f50beb9b76
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7553215
1 file changed