Decode properly flags of %ccr register on sparc64.
While at it, decode also properly one-bit flags for %fsr (accrued
and current exception flags were mixed up).

Tested successfully on sparc64-linux-gnu.

ChangeLog entry:
2017-03-07  Ivo Raisr  <ivo.raisr@oracle.com>

	PR tdep/20928
	* gdb/sparc-tdep.h (gdbarch_tdep) <sparc64_ccr_type>: New field.
	* gdb/sparc64-tdep.c (sparc64_ccr_type): New function.
	(sparc64_fsr_type): Fix %fsr decoding.


The patch and ChangeLog entry are attached.
I.