SoC: qcom: add support for SDM845

Hi-end qualcomm chip, introduced in late 2017.
Mostly used in flagship phones and tablets of 2018.
Features:
- arm64 arch
- total of 8 Kryo 385 Gold / Silver cores
- Hexagon 685 DSP
- Adreno 630 GPU

Tested only as second-stage bootloader.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Stephan Gerhold <stephan@gerhold.net>

include/configs/sdm845.h

@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Configuration file for boards, based on Qualcomm SDM845 chip
+ *
+ * (C) Copyright 2021 Dzmitry Sankouski <dsankouski@gmail.com>
+ */
+
+#ifndef __CONFIGS_SDM845_H
+#define __CONFIGS_SDM845_H
+
+#include <linux/sizes.h>
+#include <asm/arch/sysmap-sdm845.h>
+
+#define CONFIG_SYS_LOAD_ADDR	0x80000000
+#define CONFIG_SYS_BAUDRATE_TABLE	{ 115200, 230400, 460800, 921600 }
+
+/* Generic Timer Definitions */
+#define COUNTER_FREQUENCY	19000000
+
+#define EXTRA_ENV_SETTINGS \
+
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	"loadaddr=0x80000000\0"
+
+/* Size of malloc() pool */
+#define CONFIG_SYS_MALLOC_LEN   (CONFIG_ENV_SIZE + SZ_8M)
+#define CONFIG_SYS_BOOTM_LEN	SZ_64M
+
+/* Monitor Command Prompt */
+#define CONFIG_SYS_CBSIZE	512
+#define CONFIG_SYS_MAXARGS	64
+
+#endif