[HAL][GENERIC] Update of HAL_GetTickFreq() brief

Src/stm32f2xx_hal.c

diff --git a/Src/stm32f2xx_hal.c b/Src/stm32f2xx_hal.c
index 913c589..2265118 100644
--- a/Src/stm32f2xx_hal.c
+++ b/Src/stm32f2xx_hal.c
@@ -362,7 +362,8 @@
 
 /**
   * @brief return tick frequency.
-  * @retval tick period in Hz
+  * @retval Tick frequency.
+  *         Value of @ref HAL_TickFreqTypeDef.
   */
 HAL_TickFreqTypeDef HAL_GetTickFreq(void)
 {
@@ -370,7 +371,7 @@
 }
 
 /**
-  * @brief This function provides minimum delay (in milliseconds) based 
+  * @brief This function provides minimum delay (in milliseconds) based
   *        on variable incremented.
   * @note In the default implementation , SysTick timer is the source of time base.
   *       It is used to generate interrupts at regular time intervals where uwTick