Update library to latest

This includes fixes for peripheral resets, introduced by library
changes:
* b3bdf025d7 stm32: i2c: drop i2c_reset()
* df654d7f28 stm32: spi: drop spi_reset()

Fixes: https://github.com/libopencm3/libopencm3-examples/issues/240

examples/stm32/f1/lisa-m-2/spi/spi.c

@@ -59,7 +59,7 @@ static void spi_setup(void) {
           GPIO6);
 
   /* Reset SPI, SPI_CR1 register cleared, SPI is disabled */
-  spi_reset(SPI1);
+  rcc_periph_reset_pulse(RST_SPI1);
 
   /* Set up SPI in Master mode with:
    * Clock baud rate: 1/64 of peripheral clock frequency

examples/stm32/f1/lisa-m-2/spi_dma/spi_dma.c

@@ -84,7 +84,7 @@ static void spi_setup(void) {
 			GPIO6);
 
 	/* Reset SPI, SPI_CR1 register cleared, SPI is disabled */
-	spi_reset(SPI1);
+	rcc_periph_reset_pulse(RST_SPI1);
 
 	/* Explicitly disable I2S in favour of SPI operation */
 	SPI1_I2SCFGR = 0;

examples/stm32/f1/lisa-m-2/spi_dma_adv/spi_dma_adv.c

@@ -94,7 +94,7 @@ static void spi_setup(void) {
 			GPIO6);
 
 	/* Reset SPI, SPI_CR1 register cleared, SPI is disabled */
-	spi_reset(SPI1);
+	rcc_periph_reset_pulse(RST_SPI1);
 
 	/* Explicitly disable I2S in favour of SPI operation */
 	SPI1_I2SCFGR = 0;

examples/stm32/f1/stm32vl-discovery/spi/spi.c

@@ -59,7 +59,7 @@ static void spi_setup(void) {
           GPIO6);
 
   /* Reset SPI, SPI_CR1 register cleared, SPI is disabled */
-  spi_reset(SPI1);
+  rcc_periph_reset_pulse(RST_SPI1);
 
   /* Set up SPI in Master mode with:
    * Clock baud rate: 1/64 of peripheral clock frequency

examples/stm32/f3/stm32f3-discovery/i2c/i2c.c

@@ -53,7 +53,7 @@ static void i2c_setup(void)
 	rcc_periph_clock_enable(RCC_GPIOB);
 	rcc_set_i2c_clock_hsi(I2C1);
 
-	i2c_reset(I2C1);
+	rcc_periph_reset_pulse(RST_I2C1);
 	/* Setup GPIO pin GPIO_USART2_TX/GPIO9 on GPIO port A for transmit. */
 	gpio_mode_setup(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO6 | GPIO7);
 	gpio_set_af(GPIOB, GPIO_AF4, GPIO6 | GPIO7);