[aes/lint] Waive Verilator lint warnings related to split_var
[aes/lint] Waive Verilator lint warnings related to split_var

Verilator 4.210 - 4.214 erroneously generates some UNOPTFLAT warnings
despite split_var. This will most likely be resolved in Verilator 4.215.

See also Verilator/Verilator#3177.

Signed-off-by: Pirmin Vogel <386a7fc8e7338ed7899b4d9883c0ebec5de81366@lowrisc.org>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan