beaglev: update to new starfive linux and u-boot

beaglev: update to new starfive linux and u-boot

Update the commit id for u-boot to include fixes from the starfive-tech
u-boot repository:

494e5ef7b807 jh7100: Enable full 2M L2 cache
4571f5a4e1e4 vic7100: enable cache ways (L2 cache)
abb06422a5cd Remove fdt_high and initrd_high for Starfive
93099a61c7b0 starfive: beaglev: Disable SIFIVE_CLINT and enable RISCV_TIMER
bfb5abac3d1f Revert "riscv: Enable the SiFive CLINT block driver in S-Mode(VIC7100 ONLY)"
7b70e1d44ba9 defconfig: enable cache_wayenable for better performance
7c585978616b configs: earlycon=sbi is deprecated

The commit abb06422a5cd ("Remove fdt_high and initrd_high for Starfive")
has removed the need for buildroot to patch the fdt_addr_r address.

Update linux from commit in the old 5.10 branch that Fedora image was
using to head of esmil_starlight branch [1] which is currently based
on 5.13-rc5 and represents the best kernel for this board [2]. This
commit was tagged as buildroot-20210609 because the branch gets rebased
regularly.

In addition, the updated kernel now has jh7100-beaglev-starlight.dtb so
buildroot no longer needs to copy the dtb from u-boot.

[1] https://github.com/starfive-tech/linux/tree/esmil_starlight
[2] https://github.com/starfive-tech/linux/issues/26

Signed-off-by: Drew Fustini <drew@beagleboard.org>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[Arnout: add comment to refer to the tag in linux repo]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>