ARM: omap3: evm: Sync with omap3_beagle configuration

This commit does the following for OMAP3 EVM:

- Track omap3_beagle changes where possible
- Remove CONFIG_SYS_MPUCLK and CONFIG_MTD which are not needed for the
  default board configuration to work.
- Remove CONFIG_SPL_SYS_MALLOC_SIMPLE and CONFIG_SYS_MALLOC_F_LEN from
  default config. CONFIG_SYS_MALLOC_F_LEN=0x400 is set by configuration
  automatically. [allows board to boot with SERIAL_SEARCH_ALL=y]
- Use updated NAND layout:

	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
	-------------------------------------------------

Signed-off-by: Derald D. Woods <woods.technical@gmail.com>
diff --git a/include/configs/omap3_evm.h b/include/configs/omap3_evm.h
index 1392593..36bf51a 100644
--- a/include/configs/omap3_evm.h
+++ b/include/configs/omap3_evm.h
@@ -54,51 +54,58 @@
 #define CONFIG_SYS_NAND_ECCSIZE         512
 #define CONFIG_SYS_NAND_ECCBYTES        3
 #define CONFIG_NAND_OMAP_ECCSCHEME      OMAP_ECC_BCH8_CODE_HW_DETECTION_SW
-#define CONFIG_SYS_NAND_U_BOOT_OFFS     0x80000
-#define CONFIG_ENV_IS_IN_NAND           1
-#define CONFIG_ENV_SIZE                 (128 << 10) /* 128 KiB */
-#define CONFIG_SYS_ENV_SECT_SIZE        (128 << 10) /* 128 KiB */
+#define CONFIG_SYS_ENV_SECT_SIZE        SZ_128K
 #define CONFIG_ENV_OFFSET               0x260000
 #define CONFIG_ENV_ADDR                 0x260000
 #define CONFIG_ENV_OVERWRITE
 #define CONFIG_MTD_PARTITIONS           /* required for UBI partition support */
 /* NAND: SPL falcon mode configs */
 #if defined(CONFIG_SPL_OS_BOOT)
-#define CONFIG_SYS_NAND_SPL_KERNEL_OFFS 0x280000
+#define CONFIG_SYS_NAND_SPL_KERNEL_OFFS 0x2a0000
 #endif /* CONFIG_SPL_OS_BOOT */
 #endif /* CONFIG_NAND */
 
-/* MUSB */
-
-/* USB EHCI */
-#define CONFIG_SYS_USB_FAT_BOOT_PARTITION  1
-
 /* Environment */
+#define CONFIG_ENV_SIZE                 SZ_128K
+
 #define CONFIG_PREBOOT                  "usb start"
 
 #define MEM_LAYOUT_ENV_SETTINGS \
 	DEFAULT_LINUX_BOOT_ENV
 
-#define BOOTENV_DEV_NAND(devtypeu, devtypel, instance) \
-	"bootcmd_" #devtypel #instance "=" \
-	"run nandboot\0"
-#define BOOTENV_DEV_NAME_NAND(devtypeu, devtypel, instance) \
-	#devtypel #instance " "
-
 #define BOOTENV_DEV_LEGACY_MMC(devtypeu, devtypel, instance) \
 	"bootcmd_" #devtypel #instance "=" \
 	"setenv mmcdev " #instance "; " \
-	"setenv bootpart " #instance ":${mmcpart} ; " \
 	"run mmcboot\0"
 #define BOOTENV_DEV_NAME_LEGACY_MMC(devtypeu, devtypel, instance) \
 	#devtypel #instance " "
 
+#if defined(CONFIG_NAND)
+
+#define BOOTENV_DEV_NAND(devtypeu, devtypel, instance) \
+	"bootcmd_" #devtypel #instance "=" \
+	"if test ${mtdids} = '' || test ${mtdparts} = '' ; then " \
+		"echo NAND boot disabled: No mtdids and/or mtdparts; " \
+	"else " \
+		"run nandboot; " \
+	"fi\0"
+#define BOOTENV_DEV_NAME_NAND(devtypeu, devtypel, instance) \
+	#devtypel #instance " "
+
 #define BOOT_TARGET_DEVICES(func) \
 	func(MMC, mmc, 0) \
 	func(LEGACY_MMC, legacy_mmc, 0) \
 	func(UBIFS, ubifs, 0) \
 	func(NAND, nand, 0)
 
+#else /* !CONFIG_NAND */
+
+#define BOOT_TARGET_DEVICES(func) \
+	func(MMC, mmc, 0) \
+	func(LEGACY_MMC, legacy_mmc, 0)
+
+#endif /* CONFIG_NAND */
+
 #include <config_distro_bootcmd.h>
 
 #define CONFIG_EXTRA_ENV_SETTINGS \
@@ -107,31 +114,29 @@
 	"mtdids=" CONFIG_MTDIDS_DEFAULT "\0" \
 	"mtdparts=" CONFIG_MTDPARTS_DEFAULT "\0" \
 	"fdt_high=0xffffffff\0" \
+	"console=ttyO0,115200n8\0" \
 	"bootdir=/boot\0" \
 	"bootenv=uEnv.txt\0" \
 	"bootfile=zImage\0" \
+	"bootpart=0:2\0" \
 	"bootubivol=rootfs\0" \
 	"bootubipart=rootfs\0" \
 	"optargs=\0" \
 	"mmcdev=0\0" \
 	"mmcpart=2\0" \
-	"bootpart=${mmcdev}:${mmcpart}\0" \
-	"console=ttyO0,115200n8\0" \
+	"mmcroot=/dev/mmcblk0p2 rw\0" \
+	"mmcrootfstype=ext4 rootwait\0" \
 	"mmcargs=setenv bootargs console=${console} " \
 		"${mtdparts} " \
 		"${optargs} " \
-		"root=/dev/mmcblk0p2 rw " \
-		"rootfstype=ext4 rootwait\0" \
-	"nandargs=setenv bootargs console=${console} " \
-		"${mtdparts} " \
-		"${optargs} " \
-		"root=ubi0:rootfs rw ubi.mtd=rootfs noinitrd " \
-		"rootfstype=ubifs rootwait\0" \
+		"root=${mmcroot} " \
+		"rootfstype=${mmcrootfstype}\0" \
 	"loadbootenv=fatload mmc ${mmcdev} ${loadaddr} ${bootenv}\0" \
 	"ext4bootenv=ext4load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootenv}\0" \
-	"importbootenv=echo Importing environment from mmc ...; " \
+	"importbootenv=echo Importing environment from mmc${mmcdev} ...; " \
 		"env import -t ${loadaddr} ${filesize}\0" \
-	"mmcbootenv=mmc dev ${mmcdev}; " \
+	"mmcbootenv=setenv bootpart ${mmcdev}:${mmcpart}; " \
+		"mmc dev ${mmcdev}; " \
 		"if mmc rescan; then " \
 			"run loadbootenv && run importbootenv; " \
 			"run ext4bootenv && run importbootenv; " \
@@ -153,8 +158,14 @@
 				"bootz ${loadaddr} - ${fdtaddr}; " \
 			"fi; " \
 		"fi\0" \
-	"nandboot=" \
-		"if nand read ${loadaddr} kernel && nand read ${fdtaddr} dtb; then " \
+	"nandroot=ubi0:rootfs ubi.mtd=rootfs rw noinitrd\0" \
+	"nandrootfstype=ubifs rootwait\0" \
+	"nandargs=setenv bootargs console=${console} " \
+		"${mtdparts} " \
+		"${optargs} " \
+		"root=${nandroot} " \
+		"rootfstype=${nandrootfstype}\0" \
+	"nandboot=if nand read ${loadaddr} kernel && nand read ${fdtaddr} dtb; then " \
 			"echo Booting uImage from NAND MTD 'kernel' partition ...; " \
 			"run nandargs; " \
 			"bootm ${loadaddr} - ${fdtaddr}; " \