Fix typo in LIS3DSH_OUT_Y_L and LIS3DSH_OUT_Y_H defines.

This is needed if you disable the _MULTI_REGISTER_ACCEL_READ define in LIS3DSH.cpp.
Merge pull request #1 from bginter/master

Fix typo in LIS3DSH_OUT_Y_L and LIS3DSH_OUT_Y_H defines.