Remove the CONFIG_K210_WITH_QEMU option and associated conditional
code paths. The reasons for removal are:
* Simplifies code path for real hardware by removing QEMU workarounds
* The current QEMU target uses sifive_u machine, which is not designed
for K210 emulation
* For RISC-V QEMU simulation, the qemu-rv (rv-virt) target is a better
choice
* Renode can be used as an alternative for K210 simulation if needed
Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
864fdb090c