rp2/CMakeLists.txt: Enable pins.csv usage for out-of-tree boards

[mgsb]

The current generation of pins.h hard-codes rp2/boards as the directory for the board being built. Change this to use the value of MICROPY_BOARD_DIR to find pins.csv for both in-tree and out-of-tree boards.

[github-actions]

Code size report:

   bare-arm:    +0 +0.000% 
minimal x86:    +0 +0.000% 
   unix x64:    +0 +0.000% standard
      stm32:    +0 +0.000% PYBV10
     mimxrt:    +0 +0.000% TEENSY40
        rp2:    +0 +0.000% RPI_PICO
       samd:    +0 +0.000% ADAFRUIT_ITSYBITSY_M4_EXPRESS

[Gadgetoid]

I proposed more or less the same thing here #13766

Though I also dropped MICROPY_BOARDS_DIR since it doesn't get used often enough to warrant the extra obfuscation.

So yeah 👍 for this, all of our builds are using out of tree boards dirs and finding pins.csv fails and fails silently.

[ricksorensen]

Addresses/closes #14342 also

[mgsb]

I proposed more or less the same thing here #13766

Though I also dropped MICROPY_BOARDS_DIR since it doesn't get used often enough to warrant the extra obfuscation.

So yeah 👍 for this, all of our builds are using out of tree boards dirs and finding pins.csv fails and fails silently.

Ooops, sorry I missed yours. Maybe two PRs will help expedite merging :)

[Gadgetoid]

Maybe two PRs will help expedite merging :)

I hope so! 😆