forked from Mirrors/opensbi

This patch does following cosmentic changes to riscv_encoding.h: 1. Re-organize CSR defines to match CSR listing in latest RISC-V privilege spec 2. Rename CSR_HCOUNTERNEN to CSR_HCOUNTEREN Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Atish Patra <atish.patra@wdc.com>