Zicfiss depends on Zaamo

So, no need to check for Zaamo in the instruction definitions

disasm/isa_parser.cc

@@ -394,6 +394,7 @@ isa_parser_t::isa_parser_t(const char* str, const char *priv)
       extension_table[EXT_ZICFILP] = true;
     } else if (ext_str == "zicfiss") {
       extension_table[EXT_ZICFISS] = true;
+      extension_table[EXT_ZAAMO] = true;
     } else if (ext_str == "smmpm") {
       extension_table[EXT_SMMPM] = true;
     } else if (ext_str == "smnpm") {

riscv/insns/ssamoswap_d.h

@@ -1,5 +1,4 @@
 require_extension(EXT_ZICFISS);
-require_extension(EXT_ZAAMO);
 require_rv64;
 
 DECLARE_XENVCFG_VARS(SSE);

riscv/insns/ssamoswap_w.h

@@ -1,5 +1,4 @@
 require_extension(EXT_ZICFISS);
-require_extension(EXT_ZAAMO);
 
 DECLARE_XENVCFG_VARS(SSE);
 require_envcfg(SSE);