Fix Lattice ICE40HX4K-TQ144 VCC_SPI pin direction
Created by: joshtyler
This fixes a small error I made in #2144 . I accidentally set VCC_SPI as bidirectional, when it is actually a power input. This causes a ERC warning in a sensible design.
Here is the relevant part of the datasheet (p.34)
Here is the changed symbol:
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