imx8mn_beacon: Fix booting hang and switch to binman

Somewhere along the line, the board stopped being able to boot.
Rather than just fixing the issue, let's fix the issue and migrate
to binman to eliminate a warning when using custom imx tools for
generating the binary.

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>

configs/imx8mn_beacon_defconfig

@@ -25,7 +25,7 @@ CONFIG_SYS_LOAD_ADDR=0x40480000
 CONFIG_FIT=y
 CONFIG_FIT_EXTERNAL_OFFSET=0x3000
 CONFIG_SPL_LOAD_FIT=y
-CONFIG_SPL_FIT_GENERATOR="arch/arm/mach-imx/mkimage_fit_atf.sh"
+# CONFIG_USE_SPL_FIT_GENERATOR is not set
 CONFIG_OF_SYSTEM_SETUP=y
 CONFIG_DEFAULT_FDT_FILE="imx8mn-beacon-kit.dtb"
 CONFIG_ARCH_MISC_INIT=y
@@ -34,6 +34,7 @@ CONFIG_SPL_BOOTROM_SUPPORT=y
 CONFIG_SPL_SEPARATE_BSS=y
 CONFIG_SPL_I2C=y
 CONFIG_SPL_POWER=y
+CONFIG_SPL_WATCHDOG=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="u-boot=> "
 # CONFIG_BOOTM_NETBSD is not set
@@ -60,7 +61,6 @@ CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_OF_CONTROL=y
 CONFIG_SPL_OF_CONTROL=y
-CONFIG_OF_SPL_REMOVE_PROPS="interrupt-parent interrupts"
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
@@ -103,6 +103,7 @@ CONFIG_PHY_GIGE=y
 CONFIG_FEC_MXC=y
 CONFIG_MII=y
 CONFIG_PINCTRL=y
+CONFIG_SPL_PINCTRL=y
 CONFIG_PINCTRL_IMX8M=y
 CONFIG_DM_PMIC=y
 # CONFIG_SPL_PMIC_CHILDREN is not set
@@ -119,7 +120,9 @@ CONFIG_SPI=y
 CONFIG_DM_SPI=y
 CONFIG_NXP_FSPI=y
 CONFIG_SYSRESET=y
+CONFIG_SPL_SYSRESET=y
 CONFIG_SYSRESET_PSCI=y
+CONFIG_SYSRESET_WATCHDOG=y
 CONFIG_DM_THERMAL=y
 CONFIG_USB=y
 # CONFIG_SPL_DM_USB is not set
@@ -131,3 +134,4 @@ CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
 CONFIG_CI_UDC=y
 CONFIG_SDP_LOADADDR=0x0
 CONFIG_OF_LIBFDT_OVERLAY=y
+CONFIG_IMX_WATCHDOG=y