Add description for Zicclsm ISA extension.

Signed-off-by: Jesse Taube <jesse@rivosinc.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
---
V1 -> V2:
 - New patch
V2 -> V3:
 - No changes
V3 -> V4:
 - No changes
V4 -> V5:
 - No changes
V5 -> V6:
 - No changes
V6 -> V7:
 - No changes
---
 Documentation/devicetree/bindings/riscv/extensions.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index cfed80ad5540..9f6aae1f5b65 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -317,6 +317,13 @@ properties:
             The standard Zicboz extension for cache-block zeroing as ratified
             in commit 3dd606f ("Create cmobase-v1.0.pdf") of riscv-CMOs.
 
+        - const: zicclsm
+          description:
+            The standard Zicclsm extension for misaligned support for all regular
+            load and store instructions (including scalar and vector) but not AMOs
+            or other specialized forms of memory access. Defined in the
+            RISC-V RVA Profiles Specification.
+
         - const: zicntr
           description:
             The standard Zicntr extension for base counters and timers, as
-- 
2.45.2