ARM11: write_memory() avoids increment check

ARM11: write_memory() avoids increment check

When writing to a chip's "reset yourself" register, the ARM11 code
was reporting a spurious failure.  Just don't bother checking for
correctly incremented pointers given single-unit writes ... it's
a bit faster that way too.  (Reads should likely do the same thing.
For that matter, such checks are usually just a waste...)

Shrink an overlong parameter name, and associated lines'o'code.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>