* m68k-tdep.c (m68k_saved_pc_after_call): Get rid of
GDB_TARGET_IS_SUN3. Use more general SYSCALL_TRAP macro.
* config/m68k/m68klynx.mh (NATDEPFILES): Remove exec.o (it's
already in TDEPFILES).
* config/m68k/tm-m68k.h (SAVED_PC_AFTER_CALL): Use
m68k_saved_pc_after_call.
* Remove all Sun3 specific stuff.
* (FIX_CALL_DUMMY): Cast arg to bfd_putb32 to unsigned char *.
* config/m68k/tm-m68klynx.h: Define SYSCALL_TRAP as trap #10.
Disable REMOTE_BREAKPOINT mechanism.
* config/m68k/tm-sun3.h: Get rid of GDB_TARGET_IS_SUN3.
* Protect from multiple includion.
* Move Sun3 specific stuff from tm-m68k.h to here.
* Define SYSCALL_TRAP as trap #0.
* Remove def of SAVED_PC_AFTER_CALL (now in tm-m68k.h).
* gdbserver/low-lynx.c: Redo all register store/fetch stuff to
make it portable for 386 and 68k.
