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>

src/mainboard/emulation/Kconfig

@@ -3,16 +3,7 @@ if VENDOR_EMULATION
 choice
 	prompt "Mainboard model"
 
-config BOARD_EMULATION_QEMU_X86_I440FX
-	bool "QEMU x86 i440fx/piix4 (aka qemu -M pc)"
-config BOARD_EMULATION_QEMU_X86_Q35
-	bool "QEMU x86 q35/ich9 (aka qemu -M q35, since v1.4)"
-
-config BOARD_EMULATION_QEMU_ARMV7
-	bool "QEMU armv7 (vexpress-a9)"
-
-config BOARD_EMULATION_QEMU_UCB_RISCV
-	bool "QEMU ucb riscv"
+source "src/mainboard/emulation/*/Kconfig.name"
 
 endchoice
 
@@ -21,10 +12,7 @@ config BOARD_EMULATION_QEMU_X86
 	default y
 	depends on BOARD_EMULATION_QEMU_X86_I440FX || BOARD_EMULATION_QEMU_X86_Q35
 
-source "src/mainboard/emulation/qemu-i440fx/Kconfig"
-source "src/mainboard/emulation/qemu-q35/Kconfig"
-source "src/mainboard/emulation/qemu-armv7/Kconfig"
-source "src/mainboard/emulation/qemu-riscv/Kconfig"
+source "src/mainboard/emulation/*/Kconfig"
 
 config MAINBOARD_VENDOR
 	string

src/mainboard/emulation/Kconfig.name

@@ -0,0 +1,2 @@
+config VENDOR_EMULATION
+	bool "Emulation"

src/mainboard/emulation/qemu-armv7/Kconfig.name

@@ -0,0 +1,2 @@
+config BOARD_EMULATION_QEMU_ARMV7
+	bool "QEMU armv7 (vexpress-a9)"

src/mainboard/emulation/qemu-i440fx/Kconfig.name

@@ -0,0 +1,2 @@
+config BOARD_EMULATION_QEMU_X86_I440FX
+	bool "QEMU x86 i440fx/piix4 (aka qemu -M pc)"

src/mainboard/emulation/qemu-q35/Kconfig.name

@@ -0,0 +1,2 @@
+config BOARD_EMULATION_QEMU_X86_Q35
+	bool "QEMU x86 q35/ich9 (aka qemu -M q35, since v1.4)"

src/mainboard/emulation/qemu-riscv/Kconfig.name

@@ -0,0 +1,2 @@
+config BOARD_EMULATION_QEMU_UCB_RISCV
+	bool "QEMU ucb riscv"