Changed functions RtlClearAllBits and RtlSetAllBits to use SizeOfBitMap

Changed functions RtlClearAllBits and RtlSetAllBits to use SizeOfBitMap
as the number of bits, not the number of bytes in the bitmap.  This was
making the whole page allocator in ntoskrnl/mm/npool.c crash early in
the boot process with whole page allocations on.  This may affect other
things adversely as well.

The documentation for RtlInitializeBitMap is here:
http://www.osronline.com/ddkx/kmarch/k109_5sfm.htm

svn path=/trunk/; revision=11039