HID: fix I2C_HID not selected when I2C_HID_OF_ELAN is

When I2C_HID_OF_ELAN is set, we need to turn on I2C_HID_CORE to
ensure we get all the HID requirements.

Fixes: bd3cba0 ("HID: i2c-hid: elan: Add support for Elan eKTH6915 i2c-hid touchscreens")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/i2c-hid/Kconfig

@@ -66,6 +66,6 @@ endmenu
 
 config I2C_HID_CORE
 	tristate
-	default y if I2C_HID_ACPI=y || I2C_HID_OF=y || I2C_HID_OF_GOODIX=y
-	default m if I2C_HID_ACPI=m || I2C_HID_OF=m || I2C_HID_OF_GOODIX=m
+	default y if I2C_HID_ACPI=y || I2C_HID_OF=y || I2C_HID_OF_ELAN=y || I2C_HID_OF_GOODIX=y
+	default m if I2C_HID_ACPI=m || I2C_HID_OF=m || I2C_HID_OF_ELAN=m || I2C_HID_OF_GOODIX=m
 	select HID