board: qualcomm: Add support for dragonboard845c

Add support for 96Boards Dragonboard 845C aka Robotics RB3 development
platform. This board complies with 96Boards Open Platform Specifications.

Features:
- Qualcomm Snapdragon SDA845 SoC
- 4GiB RAM
- 64GiB UFS drive

U-boot is chain loaded by ABL in 64-bit mode as part of boot.img.
For detailed build and boot instructions, refer to
doc/board/qualcomm/sdm845.rst, board: dragonboard845c.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
diff --git a/configs/dragonboard845c_defconfig b/configs/dragonboard845c_defconfig
new file mode 100644
index 0000000..cf1a1d2
--- /dev/null
+++ b/configs/dragonboard845c_defconfig
@@ -0,0 +1,29 @@
+CONFIG_ARM=y
+CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_COUNTER_FREQUENCY=19000000
+CONFIG_POSITION_INDEPENDENT=y
+CONFIG_ARCH_SNAPDRAGON=y
+CONFIG_DEFAULT_DEVICE_TREE="dragonboard845c"
+CONFIG_TARGET_DRAGONBOARD845C=y
+CONFIG_IDENT_STRING="\nQualcomm-DragonBoard 845C"
+CONFIG_SYS_LOAD_ADDR=0x80000000
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_BOOTDELAY=5
+CONFIG_SAVE_PREV_BL_FDT_ADDR=y
+CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR=y
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_HUSH_PARSER=y
+CONFIG_SYS_MAXARGS=64
+CONFIG_SYS_CBSIZE=512
+CONFIG_CMD_GPIO=y
+# CONFIG_NET is not set
+CONFIG_CLK=y
+CONFIG_MSM_GPIO=y
+CONFIG_PM8916_GPIO=y
+CONFIG_PINCTRL=y
+CONFIG_DM_PMIC=y
+CONFIG_PMIC_PM8916=y
+CONFIG_MSM_GENI_SERIAL=y
+CONFIG_SPMI_MSM=y
+CONFIG_LMB_MAX_REGIONS=64