ARM: meson: Add initial support for BPI-CM4 module with BPI-CM4IO baseboard

Add support for both the BananaPi BPI-CM4 module and the BananaPi
baseboard which is compatible with the RaspberryPi CM4IO baseboard.

The BananaPi BPI-CM4 module follows the CM4 specifications at [1],
but with a single HDMI port and a single DSI output.

The current CM4IO baseboard DT should work fine on the Raspberry CM4
baseboard and other derivatives baseboards, but proper DT should
be written for other baseboards.

[1] https://datasheets.raspberrypi.com/cm4io/cm4io-datasheet.pdf

Link: https://lore.kernel.org/r/20230307-u-boot-cm4-v1-2-43f5a393cd37@linaro.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
diff --git a/configs/bananapi-cm4-cm4io_defconfig b/configs/bananapi-cm4-cm4io_defconfig
new file mode 100644
index 0000000..0801b9d
--- /dev/null
+++ b/configs/bananapi-cm4-cm4io_defconfig
@@ -0,0 +1,84 @@
+CONFIG_ARM=y
+CONFIG_ARCH_MESON=y
+CONFIG_TEXT_BASE=0x01000000
+CONFIG_NR_DRAM_BANKS=1
+CONFIG_ENV_SIZE=0x2000
+CONFIG_DM_GPIO=y
+CONFIG_DEFAULT_DEVICE_TREE="meson-g12b-bananapi-cm4-cm4io"
+CONFIG_MESON_G12A=y
+CONFIG_DEBUG_UART_BASE=0xff803000
+CONFIG_DEBUG_UART_CLOCK=24000000
+CONFIG_IDENT_STRING="bpi-cm4io"
+CONFIG_SYS_LOAD_ADDR=0x1000000
+CONFIG_DEBUG_UART=y
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x20000000
+CONFIG_REMAKE_ELF=y
+CONFIG_OF_BOARD_SETUP=y
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_MISC_INIT_R=y
+CONFIG_SYS_MAXARGS=32
+# CONFIG_CMD_BDI is not set
+# CONFIG_CMD_IMI is not set
+CONFIG_CMD_GPIO=y
+# CONFIG_CMD_LOADS is not set
+CONFIG_CMD_MMC=y
+CONFIG_CMD_PCI=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_USB_MASS_STORAGE=y
+# CONFIG_CMD_SETEXPR is not set
+CONFIG_CMD_REGULATOR=y
+CONFIG_OF_CONTROL=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_ADC=y
+CONFIG_SARADC_MESON=y
+CONFIG_BUTTON=y
+CONFIG_BUTTON_ADC=y
+CONFIG_MMC_MESON_GX=y
+CONFIG_PHY_REALTEK=y
+CONFIG_DM_MDIO=y
+CONFIG_DM_MDIO_MUX=y
+CONFIG_ETH_DESIGNWARE_MESON8B=y
+CONFIG_MDIO_MUX_MESON_G12A=y
+CONFIG_PCI=y
+CONFIG_PCIE_DW_MESON=y
+CONFIG_MESON_G12A_USB_PHY=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_MESON_G12A=y
+CONFIG_POWER_DOMAIN=y
+CONFIG_MESON_EE_POWER_DOMAIN=y
+CONFIG_DM_REGULATOR=y
+CONFIG_DM_REGULATOR_FIXED=y
+CONFIG_DM_RESET=y
+CONFIG_DEBUG_UART_ANNOUNCE=y
+CONFIG_DEBUG_UART_SKIP_INIT=y
+CONFIG_MESON_SERIAL=y
+CONFIG_SYSINFO=y
+CONFIG_SYSINFO_SMBIOS=y
+CONFIG_USB=y
+CONFIG_DM_USB_GADGET=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_DWC3=y
+CONFIG_USB_DWC3=y
+# CONFIG_USB_DWC3_GADGET is not set
+CONFIG_USB_DWC3_MESON_G12A=y
+CONFIG_USB_KEYBOARD=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_VENDOR_NUM=0x1b8e
+CONFIG_USB_GADGET_PRODUCT_NUM=0xfada
+CONFIG_USB_GADGET_DWC2_OTG=y
+CONFIG_USB_GADGET_DWC2_OTG_PHY_BUS_WIDTH_8=y
+CONFIG_USB_GADGET_DOWNLOAD=y
+CONFIG_VIDEO=y
+# CONFIG_VIDEO_BPP8 is not set
+# CONFIG_VIDEO_BPP16 is not set
+CONFIG_SYS_WHITE_ON_BLACK=y
+CONFIG_VIDEO_MESON=y
+CONFIG_VIDEO_DT_SIMPLEFB=y
+CONFIG_SPLASH_SCREEN=y
+CONFIG_SPLASH_SCREEN_ALIGN=y
+CONFIG_VIDEO_BMP_RLE8=y
+CONFIG_BMP_16BPP=y
+CONFIG_BMP_24BPP=y
+CONFIG_BMP_32BPP=y
+CONFIG_OF_LIBFDT_OVERLAY=y