Hi again, Andrew.

This patch:
- replaces several macros with the actual code
- change the type of pointer variables from u32 to void *
- removes unecessary casts
- puts the contents of mpsc_defs.h into mpsc.h and removes the mpsc_defs.h
- reflects the new names of some structs
- cleans up some whitespace

Signed-off-by: Mark A. Greer <mgreer@mvista.com>
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