configs: imxrt1050-evk: enable video support/console

Enable DM_VIDEO subsystem and its BACKLIGHT_GPIO. Then enable
SYS_WHITE_ON_BLACK to have classic black background on display. Need
also to enable CONFIG_SYS_CONSOLE_ENV_OVERWRITE to retrieve
stdin/stdout/stderr from CONFIG_EXTRA_ENV_SETTINGS.
Signed-off-by: NGiulio Benetti <giulio.benetti@benettiengineering.com>
Reviewed-by: NAnatolij Gustschin <agust@denx.de>

configs/imxrt1050-evk_defconfig

@@ -17,6 +17,7 @@ CONFIG_SPL_TEXT_BASE=0x20209000
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_SD_BOOT=y
 # CONFIG_USE_BOOTCOMMAND is not set
+CONFIG_SYS_CONSOLE_ENV_OVERWRITE=y
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_SPL_BOARD_INIT=y
 # CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
@@ -62,6 +63,9 @@ CONFIG_IMXRT_SDRAM=y
 CONFIG_FSL_LPUART=y
 CONFIG_TIMER=y
 CONFIG_SPL_TIMER=y
+CONFIG_DM_VIDEO=y
+CONFIG_BACKLIGHT_GPIO=y
+CONFIG_SYS_WHITE_ON_BLACK=y
 CONFIG_SHA1=y
 CONFIG_SHA256=y
 CONFIG_HEXDUMP=y