Add support for Clevo P65xHP series laptops

Edit: I just noticed the pull request by Jeremy that added P56xHP support. I can confirm his changes work for me. I can now change my keyboard backlight brightness and mode with the hotkeys, manually change a custom color using the utility, and the changes persist through reboot and poweroff. I'd request you add this fix to the mainline git.

I was able to successfully make and install this module. Now my airplane mode / rfkill hotkey works, which it didn't before. However, the keyboard backlight hotkeys still do nothing, nor does the clevo-xsm-wmi utility. I can change the colors and the sliders, but nothing changes when I hit apply.

uname -a produces:

Linux localhost.localdomain 4.9.12-200.local.fc25.x86_64 #1 SMP Sat Feb 25 11:04:47 PST 2017 x86_64 x86_64 x86_64 GNU/Linux

dmesg | grep -i clevo produces:

[   12.621061] clevo_xsm_wmi: loading out-of-tree module taints kernel.
[   12.621089] clevo_xsm_wmi: module verification failed: signature and/or required key missing - tainting kernel
[   12.626289] input: Clevo Airplane-Mode Hotkey as /devices/platform/clevo_xsm_wmi/input/input13
[   12.626470] clevo_xsm_wmi: Polling thread started (PID: 863), polling at 5 Hz

The output for "sudo dmidecode" is attached.

Please let me know if you need any more information. I'd really appreciate it if you could get my keyboard backlight to function properly. As it is, it defaults to a super bright blue everytime I shutdown or suspend, and the only way to change it is to boot into Windows, make the changes with the official Clevo utility, and then reboot again into Linux. I don't even need the three color zones or any effects. If I could just set it to orange or red with a lower brightness I'd be very thankful (though I wouldn't say no to the other functionality if it's not a bother).

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