HID: logitech: Add depends on LEDS_CLASS to Logitech Kconfig entry

Commit 97b741ab ("HID: lg-g15: Add keyboard and LCD backlight control")
makes the hid-lg15 kernel module, which gets configured through config
HID_LOGITECH depends on symbols from the led class. Add a depends on
LEDS_CLASS to HID_LOGITECH to avoid undefined reference errors on the
led class symbols.

Fixes: 97b741ab ("HID: lg-g15: Add keyboard and LCD backlight control")
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>