* ppc-linux-nat.c (have_ptrace_getsetregs): New variable.

	* ppc-linux-nat.c (have_ptrace_getsetregs): New variable.
	(have_ptrace_getsetfpregs): Likewise.
	fetch_all_gp_regs): New function.
	(fetch_gp_regs): New function.
	(fetch_all_fp_regs): Likewise.
	(fetch_fp_regs): New function.
	(fetch_ppc_registers): Using the new methods to fetch general-
	purpose and floating-pointer registers.
	(store_all_gp_regs): New function.
	(store_gp_regs): Likewise.
	(store_all_fp_regs): New function.
	(store_fp_regs): Likewise.
	(store_ppc_registers): Using the new methods to store general-
	purpose and floating-pointer registers.