Undo patch.

Undo patch.

libgcc/
2020-11-10  Michael Meissner  <meissner@linux.ibm.com>

	Undo
	PR libgcc/97543
	PR libgcc/97643
	* config/rs6000/t-linux (IBM128_STATIC_OBJS): New make variable.
	Set all objects to use the explicit IBM format.
	(IBM128_SHARD_CFLAGS): New make variable. Set all objects to use
	the explicit IBM format.
	(IBM128_SHARED_CFLAGS): New make variable.
	(IBM128_STATIC_CFLAGS): New make variable.
	(gcc_s_compile): Add -mno-gnu-attribute to all shared library
	modules.