Missing base on some instructions

[BrianAnakPintar]

Current value and location
Instructions such as sc_d, remuw, remw, mulw, divuw are missing base:64 for 64

Here's some example to showcase what I meant:

UDB

"sc_d": {
  "encoding": "00011------------011-----0101111",
  "variable_fields": [
      "aq",
      "rd",
      "rl",
      "rs1",
      "rs2"
  ],
  "extension": [
      "rv_a",
      "rv_zalrsc"
  ],
  "match": "0x1800302f",
  "mask": "0xf800707f"
  },

"remuw": {
  "encoding": "0000001----------111-----0111011",
  "variable_fields": [
      "rd",
      "rs1",
      "rs2"
  ],
  "extension": [
      "rv_m"
  ],
  "match": "0x200703b",
  "mask": "0xfe00707f"
  },

riscv-opcodes

"sc_d": {
  "encoding": "00011------------011-----0101111",
  "variable_fields": [
      "aq",
      "rd",
      "rl",
      "rs1",
      "rs2"
  ],
  "extension": [
      "rv64_a"
  ],
  "match": "0x1800302f",
  "mask": "0xf800707f"
  },

"remuw": {
    "encoding": "0000001----------111-----0111011",
    "variable_fields": [
        "rd",
        "rs1",
        "rs2"
    ],
    "extension": [
        "rv64_m"
    ],
    "match": "0x200703b",
    "mask": "0xfe00707f"
},

[AFOliveira]

If you check #376 that should be solved. Please note that some bases are defined as RV64 and RV32 in the case of the instruction encoding differing from one to the other, i.e. bclri

 encoding:
  RV32:
    match: 0100100----------001-----0010011
    variables:
      - name: shamt
        location: 24-20
      - name: rs1
        location: 19-15
      - name: rd
        location: 11-7
  RV64:
    match: 010010-----------001-----0010011
    variables:
      - name: shamt
        location: 25-20
      - name: rs1
        location: 19-15
      - name: rd
        location: 11-7