mb/google/link: Use automatic fan control

Several users complained of link's fan not running at all, particularly
when using ChromeOS Flex. Enabling auto fan control at boot/s3 resume
resolved the issue for them.

Change-Id: I8f0db6b6c94fac2e0dcb580be0f6df839780c38c
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80713
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/link/Kconfig

@@ -7,6 +7,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select ACPI_GNVS_USB_CHARGECTL
 	select BOARD_ROMSIZE_KB_8192
 	select EC_GOOGLE_CHROMEEC
+	select EC_GOOGLE_CHROMEEC_AUTO_FAN_CTRL
 	select EC_GOOGLE_CHROMEEC_LPC
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES