src-test2/sys/dev/uart/uart_cpu_acpi.h, branch release/11.3.0

src-test2/sys/dev/uart/uart_cpu_acpi.h, branch release/11.3.0 FreeBSD source tree https://cgit-dev.freebsd.org/src-test2/atom?h=release%2F11.3.0 2018-11-04T23:28:56Z Backport of r338074 - generalize uart_bus_probe and add SNPS support to x86 2018-11-04T23:28:56Z Matt Macy mmacy@FreeBSD.org 2018-11-04T23:28:56Z urn:sha1:07ef4418120bb9848c786af73548ff1a405b5596 Submitted by: Rajesh Kumar Differential Revision: https://reviews.freebsd.org/D17381