colibri-imx8x: provide proper CONFIG_SYS_PROMPT

Provide proper sys prompt, which should be "Colibri iMX8X #".

Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
diff --git a/configs/colibri-imx8x_defconfig b/configs/colibri-imx8x_defconfig
index 60fac23..3429dd5 100644
--- a/configs/colibri-imx8x_defconfig
+++ b/configs/colibri-imx8x_defconfig
@@ -11,6 +11,7 @@
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="fsl-imx8qxp-colibri"
 CONFIG_TARGET_COLIBRI_IMX8X=y
+CONFIG_SYS_PROMPT="Colibri iMX8X # "
 CONFIG_SYS_LOAD_ADDR=0x80280000
 CONFIG_SYS_MEMTEST_START=0x88000000
 CONFIG_SYS_MEMTEST_END=0x89000000