[opentitanlib] Alternate to unsafe code for alignment
[opentitanlib] Alternate to unsafe code for alignment

Signed-off-by: Jon Flatley <780e56ff7300c63425ed4b2a0d32e97de4459f64@google.com>

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