dt-bindings: qcom_nandc: IPQ6018 QPIC NAND documentation

Add the binding for the QPIC NAND used on IPQ6018 SoC.
Signed-off-by: Kathiravan T <kathirav@codeaurora.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/1602566124-13456-2-git-send-email-kathirav@codeaurora.org

Documentation/devicetree/bindings/mtd/qcom_nandc.txt

@@ -6,6 +6,8 @@ Required properties:
 			    SoC and it uses ADM DMA
     * "qcom,ipq4019-nand" - for QPIC NAND controller v1.4.0 being used in
                             IPQ4019 SoC and it uses BAM DMA
+    * "qcom,ipq6018-nand" - for QPIC NAND controller v1.5.0 being used in
+                            IPQ6018 SoC and it uses BAM DMA
     * "qcom,ipq8074-nand" - for QPIC NAND controller v1.5.0 being used in
                             IPQ8074 SoC and it uses BAM DMA