[coreboot] Can't build ASUS F2A85-M for a 4 megabyte flash chip

[Idwer Vollering]

Compiling for 8MB however works just fine.

Error output:

Created CBFS image (capacity = 4193256 bytes)
E: Could not add [build/coreboot_hudson_romsig.bin, 16 bytes (0
KB)@0xffc20000]; too big?
E: Failed to add 'build/coreboot_hudson_romsig.bin' into ROM image.
make: *** [build/coreboot.pre1] Error 1

$ egrep -e '^CONFIG.*SIZE' -e '^CONFIG_MAINBOARD' -e
'^CONFIG_HUDSON_.*' -e CONFIG_USE_BLOBS .config
CONFIG_USE_BLOBS=y
CONFIG_MAINBOARD_DIR="asus/f2a85-m"
CONFIG_MAINBOARD_PART_NUMBER="F2A85-M"
CONFIG_MAINBOARD_VENDOR="ASUS"
CONFIG_HW_MEM_HOLE_SIZEK=0x200000
CONFIG_HEAP_SIZE=0xc0000
CONFIG_DCACHE_RAM_SIZE=0x10000
CONFIG_HUDSON_LEGACY_FREE=y
CONFIG_STACK_SIZE=0x1000
CONFIG_XIP_ROM_SIZE=0x100000
CONFIG_MAINBOARD_SMBIOS_MANUFACTURER="ASUS"
CONFIG_MAINBOARD_VERSION="1.0"
CONFIG_CACHE_ROM_SIZE_OVERRIDE=0
CONFIG_BOARD_ROMSIZE_KB_8192=y
CONFIG_COREBOOT_ROMSIZE_KB_4096=y
CONFIG_COREBOOT_ROMSIZE_KB=4096
CONFIG_ROM_SIZE=0x400000
CONFIG_MAINBOARD_SERIAL_NUMBER="123456789"
CONFIG_MAINBOARD_SMBIOS_PRODUCT_NAME="F2A85-M"
CONFIG_HIGH_SCRATCH_MEMORY_SIZE=0xA1000
CONFIG_SMM_TSEG_SIZE=0
CONFIG_CBFS_SIZE=0x400000
CONFIG_S3_DATA_SIZE=32768
CONFIG_HUDSON_XHCI_ENABLE=y
CONFIG_HUDSON_XHCI_FWM=y
CONFIG_HUDSON_IMC_FWM=y
CONFIG_HUDSON_XHCI_FWM_FILE="3rdparty/southbridge/amd/hudson/xhci.bin"
CONFIG_HUDSON_IMC_FWM_FILE="3rdparty/southbridge/amd/hudson/imc.bin"
CONFIG_HUDSON_FWM=y
CONFIG_HUDSON_FWM_POSITION=0xFF820000
CONFIG_HUDSON_SATA_IDE=y
CONFIG_HUDSON_SATA_MODE=0x0