Don't check ix86_indirect_branch_register for GOT operand

Don't check ix86_indirect_branch_register for GOT operand

Since GOT_memory_operand and GOT32_symbol_operand are simple pattern
matches, don't check ix86_indirect_branch_register here.  If needed,
-mindirect-branch= will convert indirect branch via GOT slot to a call
and return thunk.

	* config/i386/constraints.md (Bs): Update
	ix86_indirect_branch_register check.  Don't check
	ix86_indirect_branch_register with GOT_memory_operand.
	(Bw): Likewise.
	* config/i386/predicates.md (GOT_memory_operand): Don't check
	ix86_indirect_branch_register here.
	(GOT32_symbol_operand): Likewise.

From-SVN: r256714