aarch64: Change ext type to TCGType to fix warnings

aarch64: Change ext type to TCGType to fix warnings

To fix the following warnings:

In file included from /users/pranith/qemu/tcg/tcg.c:255:
/users/pranith/qemu/tcg/aarch64/tcg-target.inc.c:879:24: warning: implicit conversion from enumeration type 'TCGMemOp' (aka 'enum TCGMemOp') to different enumeration type 'TCGType' (aka 'enum TCGType')
      [-Wenum-conversion]
        tcg_out_cmp(s, ext, a, b, b_const);
        ~~~~~~~~~~~    ^~~
/users/pranith/qemu/tcg/aarch64/tcg-target.inc.c:893:36: warning: implicit conversion from enumeration type 'TCGMemOp' (aka 'enum TCGMemOp') to different enumeration type 'TCGType' (aka 'enum TCGType')
      [-Wenum-conversion]
        tcg_out_insn(s, 3201, CBZ, ext, a, offset);
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
/users/pranith/qemu/tcg/aarch64/tcg-target.inc.c:389:65: note: expanded from macro 'tcg_out_insn'
    glue(tcg_out_insn_,FMT)(S, glue(glue(glue(I,FMT),_),OP), ## __VA_ARGS__)
                                                                ^
/users/pranith/qemu/tcg/aarch64/tcg-target.inc.c:895:37: warning: implicit conversion from enumeration type 'TCGMemOp' (aka 'enum TCGMemOp') to different enumeration type 'TCGType' (aka 'enum TCGType')
      [-Wenum-conversion]
        tcg_out_insn(s, 3201, CBNZ, ext, a, offset);
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
/users/pranith/qemu/tcg/aarch64/tcg-target.inc.c:389:65: note: expanded from macro 'tcg_out_insn'
    glue(tcg_out_insn_,FMT)(S, glue(glue(glue(I,FMT),_),OP), ## __VA_ARGS__)
                                                                ^
/users/pranith/qemu/tcg/aarch64/tcg-target.inc.c:1610:27: warning: implicit conversion from enumeration type 'TCGType' (aka 'enum TCGType') to different enumeration type 'TCGMemOp' (aka 'enum TCGMemOp')
      [-Wenum-conversion]
        tcg_out_brcond(s, ext, a2, a0, a1, const_args[1], arg_label(args[3]));
        ~~~~~~~~~~~~~~    ^~~

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Message-Id: <20170217154311.13920-1-bobby.prani@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>