arm64: dts: sdm845: Add clocks and iommus to WCN3990 WLAN node

When commit 022bccb8 ("dts: arm64/sdm845: Add WCN3990 WLAN module
device node") was posted upstream no clocks were specified.  However,
when the pack was picked into the Chrome OS kernel tree (allegedly
directly from the mailing list post) it had clock properties.

I presume that the clock should be there, so let's add it.

Fixes: 022bccb8 ("dts: arm64/sdm845: Add WCN3990 WLAN module device node")
Tested-by: Sibi Sankar <sibis@codeaurora.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
[bjorn: Add also the required iommus property]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

arch/arm64/boot/dts/qcom/sdm845.dtsi

@@ -2241,6 +2241,8 @@ wifi: wifi@18800000 {
 			reg = <0 0x18800000 0 0x800000>;
 			reg-names = "membase";
 			memory-region = <&wlan_msa_mem>;
+			clock-names = "cxo_ref_clk_pin";
+			clocks = <&rpmhcc RPMH_RF_CLK2>;
 			interrupts =
 				<GIC_SPI 414 IRQ_TYPE_LEVEL_HIGH>,
 				<GIC_SPI 415 IRQ_TYPE_LEVEL_HIGH>,
@@ -2254,6 +2256,7 @@ wifi: wifi@18800000 {
 				<GIC_SPI 423 IRQ_TYPE_LEVEL_HIGH>,
 				<GIC_SPI 424 IRQ_TYPE_LEVEL_HIGH>,
 				<GIC_SPI 425 IRQ_TYPE_LEVEL_HIGH>;
+			iommus = <&apps_smmu 0x0040 0x1>;
 		};
 	};