* i386-linux-tdep.c (i386_linux_sigcontext_addr): Make static.

* i386-linux-tdep.c (i386_linux_sigcontext_addr): Make static.
(LINUX_SIGCONTEXT_PC_OFFSET, LINUX_SIGCONEXT_SP_OFFSET): Remove
macros.
(i386_linux_sigtramp_saved_pc, i386_linux_sigtramp_saved_sp):
Remove functions.
(FRAMELESS_SIGNAL): Remove function.
(i386_linux_frame_chain, i386_linux_frame_saved_pc,
i386_linux_saved_pc_after_call): Removed.
(i386_linux_init_abi): Initialize tdep->sigcontext_addr,
tdep->sc_pc_offset and tdep->sc_sp_offset.  Don't override
frame_chain, frame_saved_pc and saved_pc_after_call any longer.