PSOC6: add SOFTFP to standard component list

This allows Cypress to deliver middleware libraries with
precompiled libraries for SoftFP ahd HardFP, separated by
component-specific sub-directories:

COMPONENT_SOFTFP/TOOLCHAIN_GCC_ARM/libcy_capsense.a
COMPONENT_HARDFP/TOOLCHAIN_GCC_ARM/libcy_capsense.a

targets/targets.json

@@ -8262,6 +8262,7 @@
         ],
         "release_versions": ["5"],
         "extra_labels": ["Cypress", "PSOC6"],
+        "components_add": ["SOFTFP"],
         "public": false
     },
     "MCU_PSOC6_M0": {