[m68k] PIC fixes

[Paul Brook]

This is a followup for a patch originally posted by Dan some time ago, with 
the two changes requested by Bernardo.

http://gcc.gnu.org/ml/gcc-patches/2005-04/msg01281.html

This is a regression where gcc tries to generate bsr.l for pic code on targets 
that don't support bsr.l.

There was some discussion about whether -fpic should use bsr.w. IIUC the 
conclusion was that even though text/data are <64k, the GOT may still be a 
long way from .text. If people want a really-small model it should be 
implemented as a separate option.

Tested on m68k-elf/-m5200
Ok for mainline and 4.x?

Paul

2005-12-20  Daniel Jacobowitz  <dan@codesourcery.com>
	Paul Brook  <paul@codesourcery.com>

	* config/m68k/m68k.c (m68k_output_pic_call): Don't use bsr.l for
	!TARGET_68020.
	* config/m68k/t-m68kelf (EXTRA_PARTS): Remove.
	(EXTRA_MULTILIB_PARTS): Set.
	* config/m68k/t-uclinux (EXTRA_PARTS): Remove.
	(EXTRA_MULTILIB_PARTS): Set.