arm64: dts: qcom: msm8916: Add Hexagon PIL node

The Hexagon core on the msm8916 provides services for audio control,
audio output, sensors and the Hexagon SDK. The Hexagon remoteproc node
allows us to boot this core.

Although its part of the core platform its left disabled as it will
crash without the rmtfs QMI service and we do not yet handle crashes
gracefully.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

arch/arm64/boot/dts/qcom/msm8916.dtsi

@@ -77,7 +77,7 @@
 			no-map;
 		};
 
-		mpss@86800000 {
+		mpss_mem: mpss@86800000 {
 			reg = <0x0 0x86800000 0x0 0x2b00000>;
 			no-map;
 		};
@@ -801,6 +801,49 @@
 				clock-names = "iface_clk";
 			};
 		};
+
+
+		hexagon@4080000 {
+			compatible = "qcom,q6v5-pil";
+			reg = <0x04080000 0x100>,
+			      <0x04020000 0x040>;
+
+			reg-names = "qdsp6", "rmb";
+
+			interrupts-extended = <&intc 0 24 1>,
+					      <&hexagon_smp2p_in 0 0>,
+					      <&hexagon_smp2p_in 1 0>,
+					      <&hexagon_smp2p_in 2 0>,
+					      <&hexagon_smp2p_in 3 0>;
+			interrupt-names = "wdog", "fatal", "ready",
+					  "handover", "stop-ack";
+
+			clocks = <&gcc GCC_MSS_CFG_AHB_CLK>,
+				 <&gcc GCC_MSS_Q6_BIMC_AXI_CLK>,
+				 <&gcc GCC_BOOT_ROM_AHB_CLK>;
+			clock-names = "iface", "bus", "mem";
+
+			qcom,smem-states = <&hexagon_smp2p_out 0>;
+			qcom,smem-state-names = "stop";
+
+			resets = <&scm 0>;
+			reset-names = "mss_restart";
+
+			mx-supply = <&pm8916_l3>;
+			pll-supply = <&pm8916_l7>;
+
+			qcom,halt-regs = <&tcsr 0x18000 0x19000 0x1a000>;
+
+			status = "disabled";
+
+			mba {
+				memory-region = <&mba_mem>;
+			};
+
+			mpss {
+				memory-region = <&mpss_mem>;
+			};
+		};
 	};
 
 	smd {