[dv/lc_ctrl] Fix jtag_map related failure
[dv/lc_ctrl] Fix jtag_map related failure

This PR fixes jtag_map null failure by adding a runtime switch.

Signed-off-by: Cindy Chen <399ad771a111eac8923348b1e2af093034e5d4f1@opentitan.org>

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