dt-bindings: arm: rockchip: Correct the descriptions for Radxa boards

Correct the descriptions of a few Radxa boards, according to the up-to-date
documentation from Radxa and the detailed explanation from Naoki. [1]  To sum
it up, the short naming, as specified by Radxa, is preferred.

[1] https://lore.kernel.org/linux-rockchip/B26C732A4DCEA9B3+282b8775-601b-4d4a-a513-4924b7940076@radxa.com/Suggested-by: FUKAUMI Naoki <naoki@radxa.com>
Signed-off-by: Dragan Simic <dsimic@manjaro.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/1e148d6cd4486b31b5e7f3824cf6bccf536b74c0.1713457260.git.dsimic@manjaro.orgSigned-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.yaml

@@ -722,7 +722,7 @@ properties:
           - const: qnap,ts433
           - const: rockchip,rk3568
 
-      - description: Radxa Compute Module 3(CM3)
+      - description: Radxa Compute Module 3 (CM3)
         items:
           - enum:
               - radxa,cm3-io
@@ -784,7 +784,7 @@ properties:
           - const: radxa,rockpis
           - const: rockchip,rk3308
 
-      - description: Radxa Rock2 Square
+      - description: Radxa Rock 2 Square
         items:
           - const: radxa,rock2-square
           - const: rockchip,rk3288
@@ -794,12 +794,12 @@ properties:
           - const: radxa,rock3a
           - const: rockchip,rk3568
 
-      - description: Radxa ROCK 5 Model A
+      - description: Radxa ROCK 5A
         items:
           - const: radxa,rock-5a
           - const: rockchip,rk3588s
 
-      - description: Radxa ROCK 5 Model B
+      - description: Radxa ROCK 5B
         items:
           - const: radxa,rock-5b
           - const: rockchip,rk3588