kconfig: automatically include mainboards

This change switches all mainboard vendors and mainboards
to be autoincluded by Kconfig, rather than having to be mentioned
explicitly.

This means, vendor and mainboard directories are becoming more
"drop in", e.g. be placed in the coreboot directory hierarchy
without having to modify any higher level coreboot files.

The long term plan is to enable out of tree mainboards / components
to be built with a given coreboot version (given that the API did
not change)

Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Change-Id: Ib68ce1478a2e12562aeac6297128a21eb174d58a
Reviewed-on: http://review.coreboot.org/9295
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
diff --git a/src/mainboard/intel/Kconfig b/src/mainboard/intel/Kconfig
index a51dc02..9f5e5af 100644
--- a/src/mainboard/intel/Kconfig
+++ b/src/mainboard/intel/Kconfig
@@ -3,48 +3,11 @@
 choice
 	prompt "Mainboard model"
 
-config BOARD_INTEL_BAKERSPORT_FSP
-	bool "Bakersport FSP-based CRB"
-config BOARD_INTEL_BAYLEYBAY_FSP
-	bool "Bayley Bay FSP-based CRB"
-config BOARD_INTEL_COUGAR_CANYON2
-	bool "Cougar Canyon 2 CRB"
-config BOARD_INTEL_D810E2CB
-	bool "D810E2CB"
-config BOARD_INTEL_D945GCLF
-	bool "D945GCLF"
-config BOARD_INTEL_EAGLEHEIGHTS
-	bool "EagleHeights"
-config BOARD_INTEL_EMERALDLAKE2
-	bool "Emerald Lake 2 CRB"
-config BOARD_INTEL_MINNOWMAX
-	bool "Minnow Max"
-config BOARD_INTEL_MOHONPEAK
-	bool "Mohon Peak CRB"
-config BOARD_INTEL_MTARVON
-	bool "3100 devkit (Mt. Arvon)"
-config BOARD_INTEL_TRUXTON
-	bool "EP80579 devkit (Truxton)"
-config BOARD_INTEL_BASKING_RIDGE
-	bool "Basking Ridge CRB"
-config BOARD_INTEL_WTM2
-	bool "Whitetip Mountain 2 CRB"
+source "src/mainboard/intel/*/Kconfig.name"
 
 endchoice
 
-source "src/mainboard/intel/bakersport_fsp/Kconfig"
-source "src/mainboard/intel/bayleybay_fsp/Kconfig"
-source "src/mainboard/intel/cougar_canyon2/Kconfig"
-source "src/mainboard/intel/d810e2cb/Kconfig"
-source "src/mainboard/intel/d945gclf/Kconfig"
-source "src/mainboard/intel/eagleheights/Kconfig"
-source "src/mainboard/intel/emeraldlake2/Kconfig"
-source "src/mainboard/intel/baskingridge/Kconfig"
-source "src/mainboard/intel/minnowmax/Kconfig"
-source "src/mainboard/intel/mohonpeak/Kconfig"
-source "src/mainboard/intel/mtarvon/Kconfig"
-source "src/mainboard/intel/truxton/Kconfig"
-source "src/mainboard/intel/wtm2/Kconfig"
+source "src/mainboard/intel/*/Kconfig"
 
 config MAINBOARD_VENDOR
 	string