ARM: omap3: beagle: Enable DM_SERIAL, update distro usage and NAND layout

This commit does the following for BeagleBoard{-xM}:

- Enable DM_SERIAL which also enables SPL_DM_SERIAL
- Misc. config updates in support of DM_SERIAL
- Use updated NAND layout (BeagleBoard):

	device nand0 <omap2-nand.0>, # parts = 6

	#: name		size			offset
	-------------------------------------------------
	0: spl		0x00080000(512k)	0x00000000
	1: u-boot	0x001e0000(1920k)	0x00080000
	2: u-boot-env	0x00020000(128k)	0x00260000
	3: dtb		0x00020000(128k)	0x00280000
	4: kernel	0x00600000(6m)		0x002a0000
	5: rootfs	0x0f760000(-)		0x008a0000
	-------------------------------------------------

- Use MMC and UBIFS support from config_distro_bootcmd.h
- Use LEGACY_MMC and NAND support defined in omap3_beagle.h

[MMC(0:1)/extlinux/extlinux.conf]
---8<-------------------------------------------------------------------
default omap3-beagle-mmc-fat
label omap3-beagle-mmc-fat
	kernel /zImage
	fdt /omap3-beagle.dtb
	append console=ttyO2,115200n8 root=/dev/mmcblk0p2 rw rootfstype=ext4 rootwait
---8<-------------------------------------------------------------------

[LEGACY_MMC(0:2)/boot/extlinux/extlinux.conf]
---8<-------------------------------------------------------------------
default omap3-beagle-mmc-ext4
label omap3-beagle-mmc-ext4
	kernel /boot/zImage
	fdt /boot/omap3-beagle.dtb
	append console=ttyO2,115200n8 root=/dev/mmcblk0p2 rw rootfstype=ext4 rootwait
---8<-------------------------------------------------------------------

[UBIFS(ubi0:rootfs)/boot/extlinux/extlinux.conf]
---8<-------------------------------------------------------------------
default omap3-beagle-nand-ubifs
label omap3-beagle-nand-ubifs
	kernel /boot/zImage
	fdt /boot/omap3-beagle.dtb
	append console=ttyO2,115200n8 root=ubi0:rootfs rw ubi.mtd=rootfs rootfstype=ubifs rootwait
---8<-------------------------------------------------------------------

The board's 'bootcmd' can also be overridden with:

	CONFIG_BOOTCOMMAND="run findfdt; run mmcboot"
	CONFIG_BOOTCOMMAND="run findfdt; run nandboot"
	CONFIG_BOOTCOMMAND="run findfdt; run ramboot"

		or

	CONFIG_BOOTCOMMAND="run findfdt; run somethingelse"

The use of 'run findfdt' is required.

Signed-off-by: Derald D. Woods <woods.technical@gmail.com>
diff --git a/configs/omap3_beagle_defconfig b/configs/omap3_beagle_defconfig
index f0169a4..35e0b3c 100644
--- a/configs/omap3_beagle_defconfig
+++ b/configs/omap3_beagle_defconfig
@@ -4,32 +4,41 @@
 CONFIG_TARGET_OMAP3_BEAGLE=y
 CONFIG_DEFAULT_DEVICE_TREE="omap3-beagle"
 CONFIG_DISTRO_DEFAULTS=y
-# CONFIG_USE_BOOTCOMMAND is not set
+CONFIG_BOOTCOMMAND="run findfdt; run distro_bootcmd"
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_DEFAULT_FDT_FILE="omap3-beagle.dtb"
 CONFIG_VERSION_VARIABLE=y
 CONFIG_SPL=y
+# CONFIG_SPL_EXT_SUPPORT is not set
 CONFIG_SPL_MTD_SUPPORT=y
 CONFIG_SPL_OS_BOOT=y
+CONFIG_SYS_PROMPT="BeagleBoard # "
 CONFIG_FASTBOOT=y
 CONFIG_FASTBOOT_BUF_ADDR=0x82000000
 CONFIG_CMD_SPL=y
-CONFIG_CMD_SPL_NAND_OFS=0x240000
+CONFIG_CMD_SPL_NAND_OFS=0x280000
+CONFIG_CMD_SPL_WRITE_SIZE=0x20000
 CONFIG_CMD_ASKENV=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
 CONFIG_CMD_NAND=y
+CONFIG_CMD_NAND_TRIMFFS=y
 CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_EXT4_WRITE=y
-CONFIG_CMD_MTDPARTS=y
-CONFIG_MTDIDS_DEFAULT="nand0=nand"
-CONFIG_MTDPARTS_DEFAULT="mtdparts=nand:512k(x-loader),1920k(u-boot),128k(u-boot-env),4m(kernel),-(fs)"
+CONFIG_CMD_FS_UUID=y
+CONFIG_MTDIDS_DEFAULT="nand0=omap2-nand.0"
+CONFIG_MTDPARTS_DEFAULT="mtdparts=omap2-nand.0:512k(spl),1920k(u-boot),128k(u-boot-env),128k(dtb),6m(kernel),-(rootfs)"
+CONFIG_CMD_UBI=y
+# CONFIG_ISO_PARTITION is not set
+# CONFIG_EFI_PARTITION is not set
+CONFIG_SPL_PARTITION_UUIDS=y
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_IS_IN_NAND=y
+CONFIG_SPL_DM=y
 CONFIG_LED_STATUS=y
 CONFIG_LED_STATUS0=y
 CONFIG_LED_STATUS_BIT=1
@@ -45,11 +54,15 @@
 CONFIG_MMC_OMAP_HS=y
 CONFIG_NAND=y
 CONFIG_SYS_NAND_BUSWIDTH_16BIT=y
+CONFIG_SYS_NAND_U_BOOT_LOCATIONS=y
+CONFIG_SYS_NAND_U_BOOT_OFFS=0x80000
 CONFIG_SPL_NAND_SIMPLE=y
+CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
 CONFIG_OMAP3_SPI=y
 CONFIG_USB=y
 CONFIG_USB_EHCI_HCD=y
+CONFIG_USB_OMAP3=y
 CONFIG_USB_MUSB_GADGET=y
 CONFIG_USB_MUSB_OMAP2PLUS=y
 CONFIG_TWL4030_USB=y
@@ -65,3 +78,5 @@
 CONFIG_USB_ETHER_SMSC95XX=y
 CONFIG_FAT_WRITE=y
 CONFIG_BCH=y
+CONFIG_SPL_OF_LIBFDT=y
+# CONFIG_EFI_LOADER is not set