package/mpd: drop tidal option

tidal option has been removed from mpd since version 0.22.10 and
https://github.com/MusicPlayerDaemon/MPD/commit/97c43954e8df3f772899cda951ad5a7dd4a24f25
resulting in the following build failure since bump of meson to version
0.60.1 in commit 78d3f2ea:

../output-1/build/mpd-0.22.11/meson.build:1:0: ERROR: Unknown options: "tidal"

Fixes:
 - http://autobuild.buildroot.org/results/b8c5879a02078f4962088dff5ae2ede1f0e6b805



Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>