ARM: dts: omap3-evm: Enable DM and devicetree for TMDSEVM{3530, 3730}

This commit updates the configuration files needed to support OF_CONTROL
on the OMAP3 EVM baseboard.

Additionally:
- CONFIG_SYS_THUMB_BUILD is enabled
- CONFIG_SPL_ENV_SUPPORT is enabled

Tested using GCC 7.2.0 [--with-float=hard --with-mode=thumb].

Signed-off-by: Derald D. Woods <woods.technical@gmail.com>

include/configs/omap3_evm.h

@@ -42,8 +42,6 @@
 #define CONFIG_SYS_NS16550_COM1         OMAP34XX_UART1
 #if defined(CONFIG_SPL_BUILD)
 #undef CONFIG_SYS_NS16550_REG_SIZE
-#else /* !CONFIG_SPL_BUILD  */
-#define CONFIG_SYS_NS16550_REG_SIZE     (-1)
 #endif /* CONFIG_SPL_BUILD */
 
 /* NAND */
@@ -86,8 +84,6 @@
 /* Environment */
 #define CONFIG_PREBOOT                  "usb start"
 
-#if !defined(CONFIG_SPL_BUILD)
-
 #include <config_distro_defaults.h>
 
 #define MEM_LAYOUT_ENV_SETTINGS \
@@ -182,6 +178,4 @@
 		"bootm ${loadaddr} - ${fdtaddr}\0" \
 	BOOTENV
 
-#endif /* !CONFIG_SPL_BUILD */
-
 #endif /* __CONFIG_H */