[coreboot] Building an image a second/third/... time fails

[h42 at memeware.net]

I had build once a coreboot image for a Intel G41 board. Then i liked to 
build for an other Intel G41 board.
I first removed the config: rm .config*
then i ran again 'make menuconfig'
chose the other Intel G41 board and ran 'make'.

I got this error:

   .....
   Compile checking out/src/fw/smm.o
   Compile checking out/src/fw/smp.o
   Compile checking out/src/fw/mtrr.o
   Compile checking out/src/fw/xen.o
   Compiling IASL src/fw/ssdt-misc.hex
out/src/fw/ssdt-misc.dsl.i      4: DefinitionBlock ("ssdt-misc.aml", 
"SSDT", 0x01, "BXPC", "BXSSDTSUSP", 0x1)
Error    6155 -                                                          
        Invalid OEM Table ID ^  (Length cannot exceed 8 characters)

ASL Input:     out/src/fw/ssdt-misc.dsl.i - 102 lines, 2567 bytes, 35 
keywords
Listing File:  out/src/fw/ssdt-misc.lst - 8393 bytes
Hex Dump:      out/src/fw/ssdt-misc.hex - 4096 bytes

Compilation complete. 1 Errors, 0 Warnings, 0 Remarks, 2 Optimizations
Makefile:254: recipe for target 'src/fw/ssdt-misc.hex' failed
make[2]: *** [src/fw/ssdt-misc.hex] Error 255
Makefile:80: recipe for target 'build' failed
make[1]: *** [build] Error 2
payloads/external/Makefile.inc:85: recipe for target 'seabios' failed
make: *** [seabios] Error 2


I then removed the config with rm .config*  ran again 'make menuconfig' 
and chose again the board that i was able to build an image before some 
minutes with a warning ( 
https://mail.coreboot.org/pipermail/coreboot/2018-August/087162.html ). 
Then i ran 'make'.
Now i also get for that board the issue i have copied above. This  
Compiling IASL src/fw/ssdt-misc.hex  failed again. But it was probably 
working before because i had got an image.