arm64: defconfig: drop ext2 filesystem and redundant ext3

ext4 filesystem can mount ext2, so drop CONFIG_EXT2_FS to make builds a
bit faster.  Drop also redundant CONFIG_EXT3_FS, because it just
selectes EXT4_FS.

Suggested-by: Arnd Bergmann <[email protected]>
Signed-off-by: Krzysztof Kozlowski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

Author: krzk

arch/arm64/configs/defconfig

@@ -1572,8 +1572,7 @@ CONFIG_RZ_MTU3_CNT=m
 CONFIG_HTE=y
 CONFIG_HTE_TEGRA194=y
 CONFIG_HTE_TEGRA194_TEST=m
-CONFIG_EXT2_FS=y
-CONFIG_EXT3_FS=y
+CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_BTRFS_FS=m
 CONFIG_BTRFS_FS_POSIX_ACL=y