dt-bindings: PCI: qcom,pcie-sm8150: Drop unrelated clocks from PCIe hosts

The TBU clock belongs to the Translation Buffer Unit, part of the SMMU.
The ref clock is already being driven upstream through some of the
branches.

Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20250521-topic-8150_pcie_drop_clocks-v1-2-3d42e84f6453@oss.qualcomm.com

Documentation/devicetree/bindings/pci/qcom,pcie-sm8150.yaml

@@ -38,8 +38,8 @@ properties:
       - const: mhi # MHI registers
 
   clocks:
-    minItems: 8
-    maxItems: 8
+    minItems: 6
+    maxItems: 6
 
   clock-names:
     items:
@@ -49,8 +49,6 @@ properties:
       - const: bus_master # Master AXI clock
       - const: bus_slave # Slave AXI clock
       - const: slave_q2a # Slave Q2A clock
-      - const: tbu # PCIe TBU clock
-      - const: ref # REFERENCE clock
 
   interrupts:
     minItems: 8
@@ -116,17 +114,13 @@ examples:
                      <&gcc GCC_PCIE_0_CFG_AHB_CLK>,
                      <&gcc GCC_PCIE_0_MSTR_AXI_CLK>,
                      <&gcc GCC_PCIE_0_SLV_AXI_CLK>,
-                     <&gcc GCC_PCIE_0_SLV_Q2A_AXI_CLK>,
-                     <&gcc GCC_AGGRE_NOC_PCIE_TBU_CLK>,
-                     <&rpmhcc RPMH_CXO_CLK>;
+                     <&gcc GCC_PCIE_0_SLV_Q2A_AXI_CLK>;
             clock-names = "pipe",
                           "aux",
                           "cfg",
                           "bus_master",
                           "bus_slave",
-                          "slave_q2a",
-                          "tbu",
-                          "ref";
+                          "slave_q2a";
 
             interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>,
                          <GIC_SPI 142 IRQ_TYPE_LEVEL_HIGH>,