configs: j784s4_evm: Enable serial flash DFU support

Enable serial flash DFU support for capsule update of firmware.

Signed-off-by: Jonathan Humphreys <j-humphreys@ti.com>
diff --git a/configs/j784s4_evm_a72_defconfig b/configs/j784s4_evm_a72_defconfig
index 2aa16eb..141f2e0 100644
--- a/configs/j784s4_evm_a72_defconfig
+++ b/configs/j784s4_evm_a72_defconfig
@@ -85,6 +85,9 @@
 CONFIG_SPL_CLK=y
 CONFIG_CLK_CCF=y
 CONFIG_CLK_TI_SCI=y
+CONFIG_DFU_SF=y
+CONFIG_SYS_DFU_DATA_BUF_SIZE=0x40000
+CONFIG_SYS_DFU_MAX_FILE_SIZE=0x800000
 CONFIG_DMA_CHANNELS=y
 CONFIG_TI_K3_NAVSS_UDMA=y
 CONFIG_TI_SCI_PROTOCOL=y