romfs: fix a use-before-set bug on checking the dirent
bsp:fix the bug of lpc43xx uart interrupt enable in driver initialize.
Merge pull request #370 from grissiom/romfs-next

romfs: fix a use-before-set bug on checking the dirent
Merge pull request #371 from nongxiaoming/master

bsp:fix the bug of lpc43xx uart interrupt enable in driver initialize.
modified the comments of block device geometry structure, to tell everyone the unit of block_size is byte.
update the change logs
Merge pull request #372 from pangweishen/master

update the change logs