Like HP EliteBooks and ZBooks, all ProBooks use the same micmute
scancode.
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHP*:pnHPEliteBook*:*
# HP ProBook 440 G2
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pnHP440G2:*
-# several HP ProBooks 4xx
-evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pnHP*ProBook4*:*
-evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHP*:pnHP*ProBook*4*:*
+# HP ProBook
+evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pnHP*ProBook*:*
+evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHP*:pnHP*ProBook*:*
# HP ZBook
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pnHPZBook*:*
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnHP*:pnHPZBook*:*