arm64: dts: imx8mp: remove arm,primecell-periphid at etm nodes

The reg size of etm nodes is incorrectly set to 64k instead of 4k. This
leads to a crash when calling amba_read_periphid().  After corrected reg
size, amba_read_periphid() retrieve the correct periphid.
arm,primecell-periphid were removed from the etm nodes.
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8mp.dtsi

@@ -306,8 +306,7 @@ soc: soc@0 {
 
 		etm0: etm@28440000 {
 			compatible = "arm,coresight-etm4x", "arm,primecell";
-			reg = <0x28440000 0x10000>;
-			arm,primecell-periphid = <0xbb95d>;
+			reg = <0x28440000 0x1000>;
 			cpu = <&A53_0>;
 			clocks = <&clk IMX8MP_CLK_MAIN_AXI>;
 			clock-names = "apb_pclk";
@@ -323,8 +322,7 @@ etm0_out_port: endpoint {
 
 		etm1: etm@28540000 {
 			compatible = "arm,coresight-etm4x", "arm,primecell";
-			reg = <0x28540000 0x10000>;
-			arm,primecell-periphid = <0xbb95d>;
+			reg = <0x28540000 0x1000>;
 			cpu = <&A53_1>;
 			clocks = <&clk IMX8MP_CLK_MAIN_AXI>;
 			clock-names = "apb_pclk";
@@ -340,8 +338,7 @@ etm1_out_port: endpoint {
 
 		etm2: etm@28640000 {
 			compatible = "arm,coresight-etm4x", "arm,primecell";
-			reg = <0x28640000 0x10000>;
-			arm,primecell-periphid = <0xbb95d>;
+			reg = <0x28640000 0x1000>;
 			cpu = <&A53_2>;
 			clocks = <&clk IMX8MP_CLK_MAIN_AXI>;
 			clock-names = "apb_pclk";
@@ -357,8 +354,7 @@ etm2_out_port: endpoint {
 
 		etm3: etm@28740000 {
 			compatible = "arm,coresight-etm4x", "arm,primecell";
-			reg = <0x28740000 0x10000>;
-			arm,primecell-periphid = <0xbb95d>;
+			reg = <0x28740000 0x1000>;
 			cpu = <&A53_3>;
 			clocks = <&clk IMX8MP_CLK_MAIN_AXI>;
 			clock-names = "apb_pclk";