Remove residual blank line at start of MakefileThis is a residual of the $FreeBSD$ removal.MFC After: 3 days (though I'll just run the command on the branches)Sponsored by: Netflix
sys: Remove $FreeBSD$: one-line sh patternRemove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/
Add amdgpio, driver for GPIO controller on AMD-based x86_64 platformsSubmitted by: Rajesh Kumar <rajbsd@gmail.com>Differential Revision: https://reviews.freebsd.org/D16865