S/390: Fix instruction type of troo, trot, trto, and trtt.

S/390: Fix instruction type of troo, trot, trto, and trtt.

opcodes/ChangeLog:

2015-10-14  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* s390-opc.c: Fix comment.
	* s390-opc.txt: Change instruction type for troo, trot, trto, and
	trtt to RRF_U0RER since the second parameter does not need to be a
	register pair.

gas/testsuite/ChangeLog:

2015-10-14  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* gas/s390/esa-g5.d: Use odd GPR for the second operand.
	* gas/s390/esa-g5.s: Likewise.
	* gas/s390/esa-z9-109.d: Likewise.
	* gas/s390/esa-z9-109.s: Likewise.