configs: stm32fxxx: Remove CONFIG_SYS_CLK_FREQ

Since commit aa5e3e22f4d6 ("board: stm32: switch to DM STM32 timer")
SYS_CLK_FREQ is useless, remove it from stm32f4 and stm32f7 boards.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/include/configs/stm32f429-discovery.h b/include/configs/stm32f429-discovery.h
index 458d433..e0f604d 100644
--- a/include/configs/stm32f429-discovery.h
+++ b/include/configs/stm32f429-discovery.h
@@ -37,8 +37,6 @@
 
 #define CONFIG_STM32_FLASH
 
-#define CONFIG_SYS_CLK_FREQ		180000000 /* 180 MHz */
-
 #define CONFIG_SYS_HZ_CLOCK		1000000	/* Timer is clocked at 1MHz */
 
 #define CONFIG_CMDLINE_TAG
diff --git a/include/configs/stm32f429-evaluation.h b/include/configs/stm32f429-evaluation.h
index 881cb2d..258ae76 100644
--- a/include/configs/stm32f429-evaluation.h
+++ b/include/configs/stm32f429-evaluation.h
@@ -33,7 +33,6 @@
 
 #define CONFIG_STM32_FLASH
 
-#define CONFIG_SYS_CLK_FREQ		180000000 /* 180 MHz */
 #define CONFIG_SYS_HZ_CLOCK		1000000	/* Timer is clocked at 1MHz */
 
 #define CONFIG_CMDLINE_TAG
diff --git a/include/configs/stm32f469-discovery.h b/include/configs/stm32f469-discovery.h
index 3d628cc..a918245 100644
--- a/include/configs/stm32f469-discovery.h
+++ b/include/configs/stm32f469-discovery.h
@@ -33,7 +33,6 @@
 
 #define CONFIG_STM32_FLASH
 
-#define CONFIG_SYS_CLK_FREQ		180000000 /* 180 MHz */
 #define CONFIG_SYS_HZ_CLOCK		1000000	/* Timer is clocked at 1MHz */
 
 #define CONFIG_CMDLINE_TAG
diff --git a/include/configs/stm32f746-disco.h b/include/configs/stm32f746-disco.h
index 567e7f2..aa45d29 100644
--- a/include/configs/stm32f746-disco.h
+++ b/include/configs/stm32f746-disco.h
@@ -34,7 +34,6 @@
 #define CONFIG_MII
 #define CONFIG_PHY_SMSC
 
-#define CONFIG_SYS_CLK_FREQ		200000000 /* 200 MHz */
 #define CONFIG_SYS_HZ_CLOCK		1000000	/* Timer is clocked at 1MHz */
 
 #define CONFIG_CMDLINE_TAG