[aes/rtl] Change order of `ctrl_reg_t` struct members
[aes/rtl] Change order of `ctrl_reg_t` struct members

This commit changes the order of the `ctrl_reg_t` struct members to
match the documentation. This has no impact on functionality or software
but it simplifies DV.

This resolves lowRISC/OpenTitan#3635.

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

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