configs: j784s4_evm : Increase Dynamic memory allocation size

Increase malloc size to 32 MB to align with other J7
family devices.

Signed-off-by: Udit Kumar <u-kumar1@ti.com>
diff --git a/configs/j784s4_evm_a72_defconfig b/configs/j784s4_evm_a72_defconfig
index 3cfa006..520a53b 100644
--- a/configs/j784s4_evm_a72_defconfig
+++ b/configs/j784s4_evm_a72_defconfig
@@ -1,5 +1,6 @@
 CONFIG_ARM=y
 CONFIG_ARCH_K3=y
+CONFIG_SYS_MALLOC_LEN=0x2000000
 CONFIG_SYS_MALLOC_F_LEN=0x8000
 CONFIG_SPL_GPIO=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y