Fixes sscan %sn where strlen(data) < n

F4 Support oversampling by 8

Add Kinetis freedom-k64f uid

32l4 pwm

Multiple stm32l4 timer fixes

- too many parentheses when calculating max chan count (???)
- channel 4 does not have a complementary output

Merged in david_s5/nuttx-5/david_s5/kinetish-edited-online-with-bitbucket-1476115086140 (pull request #144)

kinetis.h edited online with Bitbucket

Merged in david_s5/nuttx-4/david_s5/kinetish-edited-online-with-bitbucket-1476114936502 (pull request #143)

kinetis.h edited online with Bitbucket

include/nuttx/fs/nxffs.h: Needs forward reference to struct mtd_dev_s and needs to include stdbool.h

dma2d: fix an error in up_dma2dcreatelayer where an invalid pointer was returned when a certain underlying function failed.

dma2d: fix an error in up_dma2dcreatelayer where an invalid pointer was returned when a certain underlying function failed.