Corrected pinmaps for stm32f40xxx processor
Merge https://github.com/PX4/NuttX
Declared log2l() in ARM math.h
Merge pull request #16 from pavel-kirienko/arm_math_log2l

Declared log2l() in ARM math.h
Merge pull request #8 from sarthakkaingade/master

Corrected pinmaps for stm32f40xxx processor