dt-bindings: display/msm/gpu: Straighten out reg-names on A619L/610/702

These GPUs have physically have the same regions as the base case
("main" + "cx_mem" + "cx_dbgc"). Remove the specific override.

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/696547/
Message-ID: <20251229-topic-6115_2290_gpu_dbgc-v1-1-4a24d196389c@oss.qualcomm.com>
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

Documentation/devicetree/bindings/display/msm/gpu.yaml

@@ -379,12 +379,6 @@ allOf:
             - const: xo
               description: GPUCC clocksource clock
 
-        reg-names:
-          minItems: 1
-          items:
-            - const: kgsl_3d0_reg_memory
-            - const: cx_dbgc
-
       required:
         - clocks
         - clock-names