soc/amd/picasso: Use readelf to find bootblock size and location

The Picasso build describes the DRAM region where the PSP places
our bootblock.  Rather than relying on Kconfig values, make the build
more robust by using the actual size and target base address
from the boot block's ELF file.

Sample output of "readelf -l bootblock.elf" is:
------------------
Elf file type is EXEC (Executable file)
Entry point 0x203fff0
There is 1 program header, starting at offset 52

Program Headers:
  Type     Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
  LOAD     0x001000 0x02030000 0x02030000 0x10000 0x10000 RWE 0x1000

 Section to Segment mapping:
  Segment Sections...
   00     .text .data .bss .reset
------------------
We can extract the information from here.

BUG=b:154957411
TEST=Build & boot on mandolin

Change-Id: I5a26047726f897c57325387cb304fddbc73f6504
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46092
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions