omap4_sdp4430: Disable SPL_OS_BOOT

We are tight on space on this board so drop SPL_OS_BOOT
Signed-off-by: NTom Rini <trini@konsulko.com>

configs/omap4_sdp4430_defconfig

@@ -8,7 +8,6 @@ CONFIG_SYS_CONSOLE_IS_IN_ENV=y
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_VERSION_VARIABLE=y
 CONFIG_SPL=y
-CONFIG_SPL_OS_BOOT=y
 # CONFIG_CMD_IMLS is not set
 CONFIG_CMD_ASKENV=y
 # CONFIG_CMD_FLASH is not set