soc: qcom: dcc_v2: Fix offset calculation for linked list

The second offset present as part of offset descriptor needs
to take into account the length of the first offset. This
patch fixes the current offset calculation to account for it.

Change-Id: Id3b42c10b7696801b9c3c2355057852b80bdc2bf
Signed-off-by: Satyajit Desai <sadesai@codeaurora.org>