Merge pull request #10382 from kjbracey-arm/add_fpu_sdpk1

SDP_K1: Cortex-M4 -> Cortex-M4F

Author: 0xc0170

targets/targets.json

@@ -3906,7 +3906,7 @@
     },
     "SDP_K1": {
         "inherits": ["FAMILY_STM32"],
-        "core": "Cortex-M4",
+        "core": "Cortex-M4F",
         "supported_form_factors": ["ARDUINO"],
         "extra_labels_add": [
             "STM32F4",