arch/riscv: add constants for Base Extension

Get used to this rate of change, SBI adds one new function a month,
on average, for the last 7 years.

Signed-off-by: Ronald G Minnich <rminnich@gmail.com>

Change-Id: Iaad763464678d1921dfefdbee1e39fba2fe5585a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81286
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Maximilian Brune <maximilian.brune@9elements.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

0 files changed, 0 insertions, 0 deletions