ARM: tegra: enable filesystem writing

Writing to files is a useful feature in general, so enable it everywhere.
The primary purpose is to make DFU useful on filesystems in addition to
raw devices.

Signed-off-by: Stephen Warren <swarren@nvidia.com>

include/configs/tegra-common.h

@@ -140,6 +140,8 @@
 
 #ifndef CONFIG_SPL_BUILD
 #include <config_distro_defaults.h>
+#define CONFIG_CMD_EXT4_WRITE
+#define CONFIG_FAT_WRITE
 #endif
 
 #endif /* _TEGRA_COMMON_H_ */