Fix gas and binutils testsuite failures for am33_2.0-linux target.

Fix gas and binutils testsuite failures for am33_2.0-linux target.

gas	* testsuite/gas/all/gas.exp: Add am33 to the skip lists of tests
	passed over by the mn10300 target.
	* testsuite/gas/elf/elf.exp: Likewise.
	* testsuite/gas/elf/dwarf2-11.d: Correct skip of am33 target.
	* testsuite/gas/elf/dwarf2-12.d: Likewise.
	* testsuite/gas/elf/dwarf2-13.d: Likewise.
	* testsuite/gas/elf/dwarf2-14.d: Likewise.
	* testsuite/gas/elf/dwarf2-15.d: Likewise.
	* testsuite/gas/elf/dwarf2-16.d: Likewise.
	* testsuite/gas/elf/dwarf2-17.d: Likewise.
	* testsuite/gas/elf/dwarf2-18.d: Likewise.
	* testsuite/gas/elf/dwarf2-5.d: Likewise.
	* testsuite/gas/elf/dwarf2-6.d: Likewise.
	* testsuite/gas/elf/dwarf2-7.d: Likewise.

binutils * testsuite/binutils-all/objdump.exp (cpus_expected): Add am33-2.