x86/mm: avoid building multiple .o from a single .c file

x86/mm: avoid building multiple .o from a single .c file

This replace the use of a single .c file use for multiple .o file by
creating multiple .c file including the first one.

There's quite a few issues with trying to build more than one object
file from a single source file: there's is a duplication of the make
rules to generate those targets; there is an additional ".file" symbol
added in order to differentiate between the object files; and the
tools/symbols have an heuristic to try to pick up the right ".file".

This patch adds new .c source file which avoid the need to add a
second ".file" symbol and thus avoid the need to deal with those
issues.

Also remove __OBJECT_FILE__ from $(CC) command line as it isn't used
anywhere anymore. And remove the macro "build-intermediate" since the
generic rules for single targets can be used.

And rename the objects in mm/hap/ to remove the extra "level".

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>