The compiled size on the example I used increased by 536 bytes, from 44,028 to 44,564.

Like i2c, this module takes a config struct for configuration. It may not align with other classes in `daisy_seed.h`.

I didn't test the CMake build, but it should work with my single change to the cmakelists file.

The `dsy_gpio_pin` array of `qspi_impl` avoids large switch statements in the hal pin initialization.

Created SdramHandler class.
Updated all of those typedef structs to enum classes.
Renamed and slightly tweaked functions to work within class.
Updated seed board support to use cpp-ified sdram

Sdram init needed to wait until after then config
The hal map needed to be included as a C extern.
I udpated hal_map to be cpp in my GPIO pr, so that wont last long

I also restored the default linker back to its original state.

…ySeed`

cpp tag for code syntax highlighting.

This commit _may_ add a bit of unnecessary delay to the startup. If that's a problem to your use case and you'd like pre-initialized SDRAM, look into adjusting the length of the delay loop in sdram_startup.h