hw/mcu/dialog: Fix hal_spi_config()
hw/mcu/dialog: Fix hal_spi_config()

Wrong bit mask was used for masking bits in SPI_CTRL_REG.
One mask was taken from totally different register.
Second mask was not really needed.

mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core