[DFS] Add dfs_filesystem_get_mounted_path() function.
Add WEAK definition; Add AUTO Refresh option for block device.
Add WEAK definition;
[lwIP] Add LWIP_NO_RX_THREAD/LWIP_NO_TX_THREAD options for lwIP.
[BSP] Fix compiling error
bsp: add zynq7000
Merge pull request #288 from grissiom/zynq-7000

bsp: add zynq7000
[lwIP] Fix the usage issue of NETIF_LINK_CALLBACK.
add Freescale k64F bsp. FRDM-K64 based
change the uart name
rename frdm-k64f
rename frdm-k64f bsp, support gcc compile
Merge pull request #290 from geniusgogo/k64f-frdm

K64f frdm
fixed bsp/frdm-k64f gcc compile
Merge branch 'master' into k64f-frdm
Merge pull request #291 from geniusgogo/k64f-frdm

K64f frdm
[Drivers] Make code cleanup in serial framework.
[Kernel] Remove rt_device_init_all implemetation.
[Finsh] Fix command line size issue in finsh.
Merge branch 'master' of https://github.com/RT-Thread/rt-thread