dt-bindings: vendor-prefixes: add spacemit

Add new vendor strings to dt bindings for SpacemiT K1 SoC.

Link: https://www.spacemit.com/en/spacemit-key-stone-2/
Signed-off-by: Yangyu Chen <cyy@cyyself.name>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Yixun Lan <dlan@gentoo.org>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

Author: cyyself

Documentation/devicetree/bindings/vendor-prefixes.yaml

@@ -1386,6 +1386,8 @@ patternProperties:
     description: Sophgo Technology Inc.
   "^sourceparts,.*":
     description: Source Parts Inc.
+  "^spacemit,.*":
+    description: SpacemiT (Hangzhou) Technology Co. Ltd
   "^spansion,.*":
     description: Spansion Inc.
   "^sparkfun,.*":