ChromeEC: Fix the default, depends for EC_GOOGLE_CHROMEEC_I2C.

The default for this variable should be n, it should only depend on
EC_GOOGLE_CHROMEEC, and it should be (and is) explicitly enabled when
needed. This prevents it from being turned on when the EC bus is SPI.

Change-Id: Idc6651a764be4f055341a36b9b4a58990f050b0c
Signed-off-by: Gabe Black <gabeblack@chromium.org>
Reviewed-on: http://review.coreboot.org/3737
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/ec/google/chromeec/Kconfig b/src/ec/google/chromeec/Kconfig
index 773f294..48b4ae9 100644
--- a/src/ec/google/chromeec/Kconfig
+++ b/src/ec/google/chromeec/Kconfig
@@ -4,9 +4,9 @@
 	  Google's Chrome EC
 
 config EC_GOOGLE_CHROMEEC_I2C
-	depends on EC_GOOGLE_CHROMEEC && !EC_GOOGLE_CHROMEEC_LPC
+	depends on EC_GOOGLE_CHROMEEC
 	bool
-	default y
+	default n
 	help
 	  Google's Chrome EC via I2C bus.