arm: socfpga: soc64: Remove CONFIG_OF_EMBED

CONFIG_OF_EMBED was primarily enabled to support the S10/Agilex
spl hex file requirements.  Since this option now produces a
warning during build, and the spl hex can be created using
alternate methods, CONFIG_OF_EMBED is no longer needed.
Signed-off-by: NChee Hong Ang <chee.hong.ang@intel.com>

configs/socfpga_agilex_defconfig

@@ -35,7 +35,6 @@ CONFIG_CMD_CACHE=y
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
-CONFIG_OF_EMBED=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPL_DM_SEQ_ALIAS=y

configs/socfpga_stratix10_defconfig

@@ -37,7 +37,6 @@ CONFIG_CMD_CACHE=y
 CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
-CONFIG_OF_EMBED=y
 CONFIG_ENV_IS_IN_MMC=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NET_RANDOM_ETHADDR=y