ARM add initial support for the Phytium Pe2201 Board.

Add pe2201 platform code and the device tree of pe2201 platform board.
The initial support comprises the UART and PCIe.

Signed-off-by: TracyMg_Li <TracyMg_Li@outlook.com>
Changes since v1:
        fix space corrupt.
Changes since v2:
        switch to bootstd and text environment.
Changes since v3:
        add environment variables.
diff --git a/board/phytium/pe2201/cpu.h b/board/phytium/pe2201/cpu.h
new file mode 100644
index 0000000..01adbb0
--- /dev/null
+++ b/board/phytium/pe2201/cpu.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2023, Phytium Technology Co., Ltd.
+ * lixinde          <lixinde@phytium.com.cn>
+ * weichangzheng    <weichangzheng@phytium.com.cn>
+ */
+
+#ifndef _FT_PE2201_H
+#define _FT_PE2201_H
+
+/* SMCCC ID */
+#define CPU_SVC_VERSION             0xC2000F00
+#define CPU_GET_RST_SOURCE          0xC2000F01
+#define CPU_INIT_PLL                0xC2000F02
+#define CPU_INIT_PCIE               0xC2000F03
+#define CPU_INIT_MEM                0xC2000F04
+#define CPU_INIT_SEC_SVC            0xC2000F05
+
+/* CPU RESET */
+#define CPU_RESET_POWER_ON          0x1
+#define CPU_RESET_PLL               0x4
+#define CPU_RESET_WATCH_DOG         0x8
+
+/* PLL */
+#define PARAMETER_PLL_MAGIC         0x54460020
+
+/* PCIE */
+#define PARAMETER_PCIE_MAGIC        0x54460021
+#define CFG_INDEPENDENT_TREE        0x0
+#define PCI_PEU0                    0x1
+#define PCI_PEU1                    0x1
+#define PEU1_OFFSET                 16
+#define PEU_C_OFFSET_MODE           16
+#define PEU_C_OFFSET_SPEED          0
+#define X1X1X1X1                    0x2
+#define X1X1                        0x0
+#define EP_MODE                     0x0
+#define RC_MODE                     0x1
+#define GEN3                        3
+
+/* DDR */
+#define PARAMETER_MCU_MAGIC         0x54460024
+#define PARAM_MCU_VERSION           0x3
+#define PARAM_MCU_SIZE              0x100
+#define PARAM_CH_ENABLE             0x1
+
+#define RDIMM_TYPE                  0x1
+#define UDIMM_TYPE                  0x2
+#define LPDDR4_TYPE                 0x10
+#define DIMM_X8                     0x1
+#define DIMM_X16                    0x2
+#define NO_MIRROR                   0x0
+#define NO_ECC_TYPE                 0
+#define DDR4_TYPE                   0xC
+
+/* SEC */
+#define PARAMETER_COMMON_MAGIC      0x54460013
+
+void ddr_init(void);
+void sec_init(void);
+void check_reset(void);
+void pcie_init(void);
+
+#endif /* _FT_PE2201_H */