MC-F50: Anjoy SSC337DE module with NOR flash and a USB WiFi footprint

Chip and memory
- SoC is SSC337DE; measured IPL tag MVX4##I6b0g05c44beIPL_
  (https://t.me/c/1166652144/19577, https://t.me/c/1166652144/19521)
- Measured kernel log: "Memory: 74812K/81688K available", more than the
  SSC337 (MC-F40); total DDR not shown (https://t.me/c/1166652144/19608)

Flash and storage
- NOR flash: "these modules have NOR" (https://t.me/c/1166652144/19521)

Interfaces and pinout
- Footprint for an SSW101B USB WiFi module: "But it’s only wifi."
  (https://t.me/c/1166652144/18863)

Firmware support (OpenIPC / majestic / stock)
- Tino's expectation (2021-09): "At least u-boot should be unlocked"
  (https://t.me/c/1166652144/19521)

Variants, aliases and products built on it
- Written as "M{C,S}-F50 (SSC337DE)" (https://t.me/c/1166652144/19521)