- Added curly brackets to single line conditions in gpio_qpi.c and gpio_irq_api.c;
- Changed rx and tx buffers in serial module as local variables;
- Minor i2c & spi updates for github pull request;
- Added function definition for spi_master_block_write.
- Added a configuration call in trng_init to make sure the TRNG buffering mode is disabled, so only 8-bit bytes are returned;
- Moved the TRNG device handle into the trng_t structure;
- Fixed some formatting errors in the adc driver.