split ubi reformat/attach into nand_attach_ubi in preparation for reusing this code in other functions. Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
split ubi reformat/attach into nand_attach_ubi in preparation for reusing this code in other functions. Signed-off-by: Chuanhong Guo <gch981213@gmail.com>