ARM64: zynqmp: Extend malloc space before relocation

For boards which have more devices it is necessary to extend malloc
space.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/configs/xilinx_zynqmp_zcu102_revB_defconfig b/configs/xilinx_zynqmp_zcu102_revB_defconfig
index d88035d..20db671 100644
--- a/configs/xilinx_zynqmp_zcu102_revB_defconfig
+++ b/configs/xilinx_zynqmp_zcu102_revB_defconfig
@@ -1,6 +1,7 @@
 CONFIG_ARM=y
 CONFIG_SYS_CONFIG_NAME="xilinx_zynqmp_zcu102"
 CONFIG_ARCH_ZYNQMP=y
+CONFIG_SYS_MALLOC_F_LEN=0x8000
 CONFIG_DM_GPIO=y
 CONFIG_ZYNQMP_USB=y
 CONFIG_SYS_TEXT_BASE=0x8000000