mb/intel/strago: Disable Chrome EC build

Chrome EC dropped strago support, so we need to disable it here
before updating our Chrome EC submodule.

Change-Id: Ied8905e995fd040b981ce18e95e225ade496d23c
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48216
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/intel/strago/Kconfig b/src/mainboard/intel/strago/Kconfig
index 640f5d4..4ea5885 100644
--- a/src/mainboard/intel/strago/Kconfig
+++ b/src/mainboard/intel/strago/Kconfig
@@ -47,10 +47,6 @@
 	  The VGA_BIOS_ID for the C0 version of the video BIOS is hardcoded
 	  in soc/intel/braswell/Makefile.inc as 8086,22b1
 
-config EC_GOOGLE_CHROMEEC_BOARDNAME
-	string
-	default "strago"
-
 config CBFS_SIZE
 	hex
 	default 0x200000