Missed ifdefs

[descipher]

What does this implement/fix?

Optionals should not error when undefined

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other

Related issue or feature (if applicable): fixes

None

Test Environment

• ESP32
• ESP32 IDF
• ESP8266
• RP2040
• BK72xx
• RTL87xx

sensor:
  - platform: ld2420
    moving_distance:
      name : Moving Distance

binary_sensor:
  - platform: ld2420
    has_target:
      name: Presence

select:
  - platform: ld2420
    operating_mode:
      name: Operating Mode

Checklist:

• The code change is tested and works locally.
• Tests have been added to verify that the new code works (under tests/ folder).