dev/uart: Add APMC0D08 as found in the Intel E2100

This uart has the requirement for 32-bit sized and aligned memory
accesses. It is also described in the Serial Port Console Redirection
Table (SPCR) with a different interface type value.

Reviewed by: imp
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D45834