[misc, DSA] Remove mc_inlined_mem*() functions.

 * Get rid of mc_inlined_memcpy(), mc_inlined_memmove() and
   mc_inlined_memswap() from misc.h.
 * dsa_sort() uses standard memcpy() and memmove().
 * dsa_sort() uses new dsa_memswap() which is based on memcpy().

Rationale: gcc as well as MSVC inline memcpy() and memmove()
well (unless optimizations are disabled).