boards/kakute-f7-mini-v3: simple led demo for board testing

Signed-off-by: Onur Özkan <work@onurozkan.dev>

boards/kakute-f7-mini-v3/Cargo.toml

@@ -11,9 +11,10 @@ firmware = []
 
 [dependencies]
 cortex-m = "0.7"
+cortex-m-rt = "0.7"
 panic-halt = "1"
 rtic = { version = "2.3", default-features = false, features = ["thumbv7-backend"] }
-stm32f7 = { version = "0.16", default-features = false, features = ["rt", "stm32f745"] }
+stm32f7 = { version = "0.16", default-features = false, features = ["rt", "stm32f722"] }
 
 [build-dependencies]
 kaptan-spec = { path = "../../libs/kaptan-spec", features = ["std"] }