config: enable CONFIG_XFS_FS=y

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
config: switch too CONFIG_EXT4_USE_FOR_EXT23=y

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
kernel bump: v3.13-rc6

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>