tree bc30b576dd033b670c41ba772cd98ab3d58bcfab
parent a5061291da324a493c2b719c056d30355497e3ec
author Austin Appleby <aappleby@google.com> 1639011068 -0800
committer Austin Appleby <aappleby@google.com> 1643853462 -0800

Switch Tock's mailbox driver to use the RTL register map.

The previous implementation was a placeholder, now that we have a
design doc and register map for the hardware mailbox we can make the
two match up.

Additionally, clean up the driver's 'wait for mailbox event' handling.

Change-Id: I5aa43a112cef9e810dc6028a5dba327c4c4924a1