octeontx2-pf: Fix leak of SQ timestamp buffer on teardown

[ Upstream commit a056db3 ]

The send-queue timestamp ring is allocated with qmem_alloc() when
timestamping is used, but otx2_free_sq_res() never freed sq->timestamps,
leaking that memory across ifdown and device removal.  Add the missing
qmem_free() alongside the other SQ companion buffers.

Fixes: c9c12d3 ("octeontx2-pf: Add support for PTP clock")
Cc: Aleksey Makarov <amakarov@marvell.com>
Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260615030704.504536-1-rkannoth@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: rkannoth1

drivers/net/ethernet/marvell/octeontx2/nic/otx2_pf.c

@@ -1448,6 +1448,7 @@ static void otx2_free_sq_res(struct otx2_nic *pf)
 			continue;
 		qmem_free(pf->dev, sq->sqe);
 		qmem_free(pf->dev, sq->tso_hdrs);
+		qmem_free(pf->dev, sq->timestamps);
 		kfree(sq->sg);
 		kfree(sq->sqb_ptrs);
 	}