[PATCH] Added FDT PAD memory size while reserving memory for FDT to avoid some memory corruption issue

[Selvakumar Velandi]

Hi,

Issue:
Linux kernel getting crash after loading kernel in VM system using RISCV
QEMU.

RootCause:
Memory corruption in uboot FDT memory while launching a VM system in RISCV
QEMU.

Fix:
In the board_f.c file the FDT memory region is reserved without FDT padding
bytes. uboot will add some params like bootargs while launching linux.
While relocate the FDT, if its decided as run in the Fixed memory location
i.e fdy_high is set as -1, then the padding bytes not added while
relocating the FDT,
but the size is blindly added with padding bytes without reserving the
physical memory in the FDT header in the image_fdt.c file.

Please find the attached patch file to fix the issue. Please review and
revert your comments.

Regards,
SelvakumarVelandi
Krutrim SI designs

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