mb/siemens/mc_ehl: Move Kconfig switch to variants

SOC_INTEL_ELKHARTLAKE_TCO_NO_REBOOT_EN has to be handled differently at
variant level in upcoming mainboards. This patch moves the switch from
upper mc_ehl level to board-specific level.

TEST=Compared .config files for all boards after defconfig completed
before and after the patch for all boards.

Change-Id: I5adb978152eb9f465e30988f39d1ea7815403ce0
Signed-off-by: Uwe Poeche <uwe.poeche@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90333
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>

src/mainboard/siemens/mc_ehl/Kconfig

@@ -55,7 +55,4 @@ config MAINBOARD_PART_NUMBER
 config DEVICETREE
 	default "variants/\$(CONFIG_VARIANT_DIR)/devicetree.cb"
 
-config SOC_INTEL_ELKHARTLAKE_TCO_NO_REBOOT_EN
-	default y
-
 endif # BOARD_SIEMENS_BASEBOARD_MC_EHL

src/mainboard/siemens/mc_ehl/variants/mc_ehl1/Kconfig

@@ -36,4 +36,7 @@ config EARLY_PCI_MMIO_BASE
 	depends on NC_FPGA_POST_CODE
 	default 0xfe800000
 
+config SOC_INTEL_ELKHARTLAKE_TCO_NO_REBOOT_EN
+	default y
+
 endif # BOARD_SIEMENS_MC_EHL1

src/mainboard/siemens/mc_ehl/variants/mc_ehl2/Kconfig

@@ -21,4 +21,7 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config SOC_INTEL_ELKHARTLAKE_TCO_NO_REBOOT_EN
+	default y
+
 endif # BOARD_SIEMENS_MC_EHL2

src/mainboard/siemens/mc_ehl/variants/mc_ehl3/Kconfig

@@ -22,4 +22,7 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config SOC_INTEL_ELKHARTLAKE_TCO_NO_REBOOT_EN
+	default y
+
 endif # BOARD_SIEMENS_MC_EHL3

src/mainboard/siemens/mc_ehl/variants/mc_ehl4/Kconfig

@@ -31,4 +31,7 @@ config EARLY_PCI_MMIO_BASE
 	depends on NC_FPGA_POST_CODE
 	default 0xfe800000
 
+config SOC_INTEL_ELKHARTLAKE_TCO_NO_REBOOT_EN
+	default y
+
 endif # BOARD_SIEMENS_MC_EHL4

src/mainboard/siemens/mc_ehl/variants/mc_ehl5/Kconfig

@@ -22,4 +22,7 @@ config UART_FOR_CONSOLE
 	int
 	default 0
 
+config SOC_INTEL_ELKHARTLAKE_TCO_NO_REBOOT_EN
+	default y
+
 endif # BOARD_SIEMENS_MC_EHL5

src/mainboard/siemens/mc_ehl/variants/mc_ehl6/Kconfig

@@ -37,4 +37,7 @@ config EARLY_PCI_MMIO_BASE
 	depends on NC_FPGA_POST_CODE
 	default 0xfe800000
 
+config SOC_INTEL_ELKHARTLAKE_TCO_NO_REBOOT_EN
+	default y
+
 endif # BOARD_SIEMENS_MC_EHL6