hw/riscv: sifive_u: Sort the SoC memmap table entries

hw/riscv: sifive_u: Sort the SoC memmap table entries

Move the flash and DRAM to the end of the SoC memmap table.

Signed-off-by: Bin Meng <[email protected]>
Reviewed-by: Alistair Francis <[email protected]>
Message-id: 1592268641[email protected]
Message-Id: <1592268641[email protected]>
Signed-off-by: Alistair Francis <[email protected]>