[coreboot] [PATCH]clean up bootblocksize handling in cbfstool, kconfig

[Patrick Georgi]

Hi,

attached patch cleans up the bootblock size handling:
1. cbfstool create does no longer take a value it doesn't parse anyway 
(bootblocksize), but creates a bootblock of the size of the file that's 
filled in.

2. kconfig and newconfig are adapted to not pass the value

3. CONFIG_ROMBASE in kconfig isn't set to the ROM size, but to 4GB-64KB, 
ie. the standard start address of the bootblock. That's how it's used 
anyway (which didn't show because the linker script moves into top 64K 
if necessary)

4. BOOTBLOCK_SIZE in src/arch/i386/Makefile.inc isn't used anymore, so 
it's dropped.

Change #1 requires #2, so mixing cbfstool versions must not happen (but 
usually won't happen)

Signed-off-by: Patrick Georgi

Patrick