fixed PHY link status error for AT91SAM9260
Modify the interrupt interface implementations, changes in the part of the parameter definition.
Modified the interrupt function comments
remain the old handler to keep forward compatibility
bsp/simulator: enable mouse motion track in SDL

Tested OK in RTGUI repo.
add libc in link when enable RT_USING_NEWLIB
Merge pull request #55 from grissiom/bsp-sim-enable-mouse-move

bsp/simulator: enable mouse motion track in SDL
Merge pull request #54 from weety/new-branch

Modify the interrupt interface implementations and changes some parameters definition
implement __rt_ffs in kernel service library
update mmcsd: use local ffs and fls.