arch/riscv: Update encoding.h and adjust related code

Update encoding.h to the version shipped with spike commit
0185d36 ("Merge pull request #165 from riscv/small_progbuf"),
and copy the license header from the LICENSE file.

Change-Id: I517042e5865986e88a589dc8623745f8d584d6b8
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/23773
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

0 files changed, 0 insertions, 0 deletions