Replace example stm32f4 config

This replaces the base stm32f4 config with more board specific examples
for the stm32f407 discovery kit and stm32f411 blackpill board.

Author: AlexLanzano

config/examples/stm32f4.config …nfig/examples/stm32f407-discovery.configconfig/examples/stm32f4.config renamed to config/examples/stm32f407-discovery.config config/examples/stm32f4.config renamed to config/examples/stm32f407-discovery.config

@@ -9,3 +9,8 @@ WOLFBOOT_SECTOR_SIZE?=0x20000
 WOLFBOOT_PARTITION_BOOT_ADDRESS?=0x08020000
 WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x08040000
 WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x08060000
+CLOCK_SPEED?=160000000
+STM32_PLLM?=8
+STM32_PLLN?=336
+STM32_PLLP?=2
+STM32_PLLQ?=7

config/examples/stm32f411-blackpill.config

@@ -0,0 +1,21 @@
+ARCH?=ARM
+TARGET?=stm32f4
+SIGN?=ED25519
+HASH?=SHA256
+VTOR?=1
+SPMATH?=1
+WOLFBOOT_ORIGIN?=0x08000000
+WOLFBOOT_PARTITION_SIZE?=0x20000
+WOLFBOOT_SECTOR_SIZE?=0x20000
+WOLFBOOT_PARTITION_BOOT_ADDRESS?=0x08020000
+WOLFBOOT_PARTITION_UPDATE_ADDRESS?=0x08040000
+WOLFBOOT_PARTITION_SWAP_ADDRESS?=0x08060000
+CLOCK_SPEED?=84000000
+STM32_PLLM?=25
+STM32_PLLN?=336
+STM32_PLLP?=4
+STM32_PLLQ?=7
+USE_UART1?=1
+UART_FLASH?=1
+DEBUG?=1
+STM32?=1