stm32: crc: merge duplicate documentation

Avoids warnings from doxygen.  Leaves it purely in the headers so it's
accessible in code completion as well.

include/libopencm3/stm32/common/crc_common_all.h

@@ -94,16 +94,20 @@ BEGIN_DECLS
 void crc_reset(void);
 
 /**
- * Add a word to the CRC calculator and return the result.
- * @param data new word to add to the CRC calculator
- * @return final CRC calculator value
+ * Writes a data word to the register, the write operation stalling until
+ * the computation is complete.
+ * @param[in] data new word to add to the CRC calculator
+ * @returns int32 Computed CRC result
  */
 uint32_t crc_calculate(uint32_t data);
 
 /**
- * Add a block of data to the CRC calculator and return the final result
- * @param datap pointer to the start of a block of 32bit data words
- * @param size length of data, in 32bit increments
+ * Add a block of data to the CRC calculator and return the final result.
+ * Writes data words consecutively to the register, the write operation
+ * stalling until the computation of each word is complete, then
+ * returns the final result
+ * @param[in] datap pointer to an array of 32 bit data words.
+ * @param[in] size length of data, in 32bit increments
  * @return final CRC calculator value
  */
 uint32_t crc_calculate_block(uint32_t *datap, int size);

lib/stm32/common/crc_common_all.c

@@ -28,28 +28,11 @@
 
 /**@{*/
 
-/*---------------------------------------------------------------------------*/
-/** @brief CRC Reset.
-
-Reset the CRC unit and forces the data register to all 1s.
-
-*/
-
 void crc_reset(void)
 {
 	CRC_CR |= CRC_CR_RESET;
 }
 
-/*---------------------------------------------------------------------------*/
-/** @brief CRC Calculate.
-
-Writes a data word to the register, the write operation stalling until the
-computation is complete.
-
-@param[in] data Unsigned int32.
-@returns int32 Computed CRC result
-*/
-
 uint32_t crc_calculate(uint32_t data)
 {
 	CRC_DR = data;
@@ -57,17 +40,6 @@ uint32_t crc_calculate(uint32_t data)
 	return CRC_DR;
 }
 
-/*---------------------------------------------------------------------------*/
-/** @brief CRC Calculate of a Block of Data.
-
-Writes data words consecutively to the register, the write operation stalling
-until the computation of each word is complete.
-
-@param[in] datap Unsigned int32. pointer to an array of 32 bit data words.
-@param[in] size int. Size of the array.
-@returns int32 Final computed CRC result
-*/
-
 uint32_t crc_calculate_block(uint32_t *datap, int size)
 {
 	int i;