Support for "setPins"?

Adafruit's fork has an additional function for overriding used pins and choosing the SPI instance. Which is very handy.

With the following defaults and signature:
```c++
public: void setPins(int8_t cs = 10, int8_t ready = 7, int8_t reset = 5, int8_t gpio0 = 6, arduino::SPIClass *spi = &SPI)
```

Would it be accepted and possible to upstream this functionality?