platform/x86/dell: alienware-wmi: Use kasprintf()

Use kasprintf() instead of hand writing it.
This saves the need of an intermediate buffer.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/f2b2c9e5d80550e480a627c1b2139d5cc9472ffa.1699775015.git.christophe.jaillet@wanadoo.fr
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

platform/x86/dell: alienware-wmi: Use sysfs_emit() instead of scnprintf()

Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.

Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Link: https://lore.kernel.org/r/202212021721543696124@zte.com.cn
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

platform/x86: use PLATFORM_DEVID_NONE instead of -1

Use the `PLATFORM_DEVID_NONE` constant instead of
hard-coding -1 when creating a platform device.

No functional changes are intended.

Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Link: https://lore.kernel.org/r/20220930104857.2796923-1-pobrn@protonmail.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

platform/x86: Adjust Dell drivers to a personal email address

So that I can always be reached in the future if necessary, add a
personal email address.

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Link: https://lore.kernel.org/r/20210401162206.26901-4-mario.limonciello@dell.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

MAINTAINERS: Add missing section for alienware-wmi driver

This driver is maintained by Dell, but it was missing in MAINTAINERS.

Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Link: https://lore.kernel.org/r/20210401162206.26901-3-mario.limonciello@dell.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

platform/x86: Move all dell drivers to their own subdirectory

A user without a Dell system doesn't need to pick any of these
drivers.

Users with a Dell system can enable this submenu and all drivers
behind it will be enabled.

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mario Limonciello <mario.limonciello@dell.com>
Link: https://lore.kernel.org/r/20210203195832.2950605-1-mario.limonciello@dell.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>