ARM: da850evm: Increase Malloc Size

The SPI NOR frameware was recently updated, but they require a little
more memory that we had previosly allocated, so it stopped booting.
This patch doubles the size of CONFIG_SPL_SYS_MALLOC_F_LEN to 0x800.

Fixes: c4e8862308d4 ("mtd: spi: Switch to new SPI NOR framework")

Signed-off-by: Adam Ford <aford173@gmail.com>
diff --git a/configs/da850evm_direct_nor_defconfig b/configs/da850evm_direct_nor_defconfig
index be818df..166e77b 100644
--- a/configs/da850evm_direct_nor_defconfig
+++ b/configs/da850evm_direct_nor_defconfig
@@ -4,6 +4,7 @@
 CONFIG_TARGET_DA850EVM=y
 CONFIG_DA850_LOWLEVEL=y
 CONFIG_TI_COMMON_CMD_OPTIONS=y
+CONFIG_SYS_MALLOC_F_LEN=0x800
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_SYS_EXTRA_OPTIONS="USE_NOR,DIRECT_NOR_BOOT"
 CONFIG_BOOTDELAY=3