stm32f1: spi: use SPI mode 0 instead of SPI mode 3

source/platform/stm32f1/spi.c

@@ -20,8 +20,8 @@ static void stm32f1_spi_init(void)
 	spi_reset(SPI1);
 	spi_init_master(SPI1,
 		SPI_CR1_BAUDRATE_FPCLK_DIV_64,
-		SPI_CR1_CPOL_CLK_TO_1_WHEN_IDLE,
+		SPI_CR1_CPOL_CLK_TO_0_WHEN_IDLE,
-		SPI_CR1_CPHA_CLK_TRANSITION_2,
+		SPI_CR1_CPHA_CLK_TRANSITION_1,
 		SPI_CR1_DFF_8BIT,
 		SPI_CR1_MSBFIRST);
 	spi_enable_software_slave_management(SPI1);