arch: arm: add support for Sidekiq Z2 board

This adds support for the Sidekiq Z2 board, which has been adapted from
Pluto.

What differs from Pluto:
* all names referring to Pluto/PlutoSDR have been changed to SidekiqZ2
* USB vendor & product ID has been changed to Epiq Solutions & SidekiqZ2

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>

arch/arm/dts/Makefile

@@ -97,6 +97,7 @@ dtb-$(CONFIG_ARCH_ZYNQ) += zynq-zc702.dtb \
 	zynq-picozed-sdr2.dtb \
 	zynq-pluto-sdr.dtb \
 	zynq-m2k.dtb \
+	zynq-sidekiqz2.dtb \
 	zynq-zc770-xm010.dtb \
 	zynq-zc770-xm011.dtb \
 	zynq-zc770-xm012.dtb \

arch/arm/dts/zynq-sidekiqz2.dts

@@ -0,0 +1,77 @@
+/*
+ * Epiq Solutions Sidekiq Z2 board DTS
+ *
+ * Copyright (C) 2018 Analog Devices Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+/dts-v1/;
+#include "zynq-7000.dtsi"
+
+/ {
+	model = "Zynq Sidekiq Z2 Board";
+	compatible = "xlnx,zynq-7000";
+
+	aliases {
+		ethernet0 = &gem0;
+		serial0 = &uart1;
+		spi0 = &qspi;
+	};
+
+	memory {
+		device_type = "memory";
+		reg = <0x0 0x20000000>;
+	};
+
+	chosen {
+		bootargs = "earlyprintk";
+		linux,stdout-path = &uart1;
+		stdout-path = &uart1;
+	};
+
+	usb_phy0: phy0 {
+		compatible = "usb-nop-xceiv";
+		#phy-cells = <0>;
+	};
+};
+
+&qspi {
+	status = "okay";
+	is-dual = <0>;
+	num-cs = <1>;
+	flash@0 {
+		compatible = "n25q256a11,";
+		reg = <0x0>;
+		spi-tx-bus-width = <1>;
+		spi-rx-bus-width = <4>;
+		spi-max-frequency = <50000000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		partition@qspi-fsbl-uboot {
+			label = "qspi-fsbl-uboot";
+			reg = <0x0 0x100000>; /* 1M */
+		};
+		partition@qspi-uboot-env {
+			label = "qspi-uboot-env";
+			reg = <0x100000 0x20000>; /* 128k */
+		};
+		partition@qspi-nvmfs {
+			label = "qspi-nvmfs";
+			reg = <0x120000 0xE0000>; /* 1M */
+		};
+		partition@qspi-linux {
+			label = "qspi-linux";
+			reg = <0x200000 0x1E00000>; /* 30M */
+		};
+	};
+};
+
+&uart1 {
+	status = "okay";
+};
+
+&usb0 {
+	status = "okay";
+	dr_mode = "host";
+	usb-phy = <&usb_phy0>;
+};

configs/zynq_sidekiqz2_defconfig

@@ -0,0 +1,56 @@
+CONFIG_ARM=y
+CONFIG_SYS_CONFIG_NAME="zynq_zc70x"
+CONFIG_ARCH_ZYNQ=y
+CONFIG_SYS_MALLOC_F_LEN=0x800
+CONFIG_DEFAULT_DEVICE_TREE="zynq-sidekiqz2"
+CONFIG_SPL=y
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_BOOTDELAY=0
+CONFIG_SYS_NO_FLASH=y
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_PROMPT="SidekiqZ2> "
+# CONFIG_CMD_IMLS is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_DFU=y
+CONFIG_CMD_GPIO=y
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_CMD_NET is not set
+# CONFIG_CMD_NFS is not set
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_OF_EMBED=y
+CONFIG_SPL_DM_SEQ_ALIAS=y
+CONFIG_LED=y
+CONFIG_LED_GPIO=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_ISSI=y
+CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_WINBOND=y
+CONFIG_ZYNQ_QSPI=y
+CONFIG_USB=y
+CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_ULPI_VIEWPORT=y
+CONFIG_USB_ULPI=y
+CONFIG_USB_STORAGE=y
+CONFIG_USB_GADGET=y
+CONFIG_CI_UDC=y
+CONFIG_USB_GADGET_VBUS_DRAW=500
+CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_G_DNL_MANUFACTURER="Epiq Solutions"
+CONFIG_G_DNL_VENDOR_NUM=0x2fa2
+CONFIG_G_DNL_PRODUCT_NUM=0x5a02
+CONFIG_REGEX=y
+CONFIG_LIB_RAND=y