UPSTREAM: ec/google/wilco: Hide wilco symbols when unused

This cleans up .config file from unused wilco symbols.

BUG=none
BRANCH=none
TEST=none

Change-Id: Ie836f9aa6f49e8bfbc455fd175e309297a1cff6a
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Commit-Id: 77f778c0c3170b53e718376df089682e295947f7
Original-Change-Id: I813d3fe57b97e2c1ba67e1e3674de256c2529029
Original-Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Original-Reviewed-on: https://review.coreboot.org/c/coreboot/+/34539
Original-Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Original-Reviewed-by: Martin Roth <martinroth@google.com>
Original-Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Original-Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/coreboot/+/1718935
Reviewed-by: Patrick Georgi <pgeorgi@chromium.org>
Tested-by: Patrick Georgi <pgeorgi@chromium.org>
Commit-Queue: Patrick Georgi <pgeorgi@chromium.org>
diff --git a/src/ec/google/wilco/Kconfig b/src/ec/google/wilco/Kconfig
index 4202c1d..25d7cfa 100644
--- a/src/ec/google/wilco/Kconfig
+++ b/src/ec/google/wilco/Kconfig
@@ -6,6 +6,8 @@
 	help
 	  Google Wilco Embedded Controller interface.
 
+if EC_GOOGLE_WILCO
+
 config EC_BASE_ACPI_DATA
 	hex
 	default 0x930
@@ -46,3 +48,5 @@
 	  mailbox interface data region.  This data buffer is used along
 	  with the host command and data registers to drive the EC
 	  mailbox interface.  This is also the MEC EMI base address.
+
+endif # EC_GOOGLE_WILCO