The apple assembler for arm can handle the gnu binutils style
macros just fine these days, so there is no need to duplicate all
of these macros in two syntaxes, when the new one works fine in all cases.
We already require a new enough assembler to support the gnu binutils
style features since we use the .rept directive in a few places.
Previously the assembly sources had mixed indentation consisting
of both spaces and tabs, making it quite hard to read unless
the right tab size was used in the editor.
Tabs have been interpreted as 4 spaces in most cases, matching
the surrounding code.
