sb/amd/cimx/sb800: Remove unused BOOTBLOCK_SOUTHBRIDGE_INIT

Change-Id: Ie0dc165076644e225064568b4cb6f73b2af66438
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37965
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
diff --git a/src/southbridge/amd/cimx/sb800/Kconfig b/src/southbridge/amd/cimx/sb800/Kconfig
index 0b790b0..d62b638 100644
--- a/src/southbridge/amd/cimx/sb800/Kconfig
+++ b/src/southbridge/amd/cimx/sb800/Kconfig
@@ -26,10 +26,6 @@
 	select SOC_AMD_COMMON_BLOCK_ACPIMMIO
 
 if SOUTHBRIDGE_AMD_CIMX_SB800
-config BOOTBLOCK_SOUTHBRIDGE_INIT
-	string
-	default "southbridge/amd/cimx/sb800/bootblock.c"
-
 config ENABLE_IDE_COMBINED_MODE
 	bool "Enable SATA IDE combined mode"
 	default n