target/riscv: Simplify check for EEW = 64 in trans_rvv.c.inc

Only V extension supports EEW = 64 in these cases: Zve64* extensions don't
support EEW = 64 in these cases as commented before the check.

Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-ID: <20230215020539.4788-14-liweiwei@iscas.ac.cn>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
1 file changed