dt-bindings: riscv: extensions: Drop unnecessary select schema

The "select" schema is not necessary because this schema is referenced by
riscv/cpus.yaml schema.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
This commit is contained in:
Rob Herring (Arm) 2026-01-05 15:29:09 -06:00 • committed by Conor Dooley
commit a36b2aaae7