audio/sndio: Update to 1.2.0

• Update PORTVERSION and distinfo checksum (1.2.0)
• Remove unneeded patches
• Update pkg-message according to changes

• Improved OSS support
• Support for snd_uaudio(4) /dev/umidi* interfaces. /dev/umidi1.0 maps to rmidi/1 in sndio, /dev/umidi1.1 to rmidi/1.1
• The configure script has support for DragonFly
• More detailed changes: https://pkg.tobik.me/sndio-1.2.0-changes.txt

PR: 214210
Submitted by: Tobias Kortkamp <t@tobik.me> (maintainer)
Approved by: feld (mentor)