keymap: Add microphone mute keymap for several HP laptops

On these several HP laptops, the microphone mute hotkey is "Fn+F8" and
the scancode for this hotkey is 0x81, but this scancode was mapped to
fn_esc in the HP generic keymap section. To fix this problem, we add
a machine specific keymap section to add the correct keymap rule.

BugLink: https://bugs.launchpad.net/bugs/1409721
BugLink: https://bugs.launchpad.net/bugs/1334968
Signed-off-by: Hui Wang <hui.wang@canonical.com>

Author: jason77-wang

hwdb/60-keyboard.hwdb

@@ -473,6 +473,14 @@ keyboard:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pnFalco:pvr*
 # KEYBOARD_KEY_3e=fullscreen, no defined key sym
 
 
+# HP EliteBook 725 G2
+keyboard:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pnHPLicrice:pvr*
+# HP ProBook 440 G2
+keyboard:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pnHP440G2:pvr*
+# HP ProBook 445 G1
+keyboard:dmi:bvn*:bvr*:bd*:svnHewlett-Packard*:pnHPProBook445G1NotebookPC:pvr*
+ KEYBOARD_KEY_81=f20                                    # Fn+F8; Microphone mute button, should be micmute
+
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 # IBM
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