JFFS2 write-buffering support

configname: CONFIG_JFFS2_FS_WRITEBUFFER

Linux Kernel Configuration
└─>File systems
└─>Miscellaneous filesystems
└─>JFFS2 write-buffering support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
This enables the write-buffering support in JFFS2.

This functionality is required to support JFFS2 on the following
types of flash devices:
- NAND flash
- NOR flash with transparent ECC
- DataFlash