boards_sfe code is not suitable with SDK 2.5.1

[rillhu]

the common examples of board_sfe is old than the SDK version. So All makefile should be updated such as below:

INCLUDES = -I$(SDKPATH)/utils
INCLUDES+= -I$(SDKPATH)/third_party/exactle/ble-host/sources/stack/l2c
INCLUDES+= -I$(SDKPATH)/third_party/exactle/ble-profiles/sources/profiles/hid
INCLUDES+= -I$(SDKPATH)/third_party/exactle/ble-profiles/sources/profiles/fmpl
INCLUDES+= -I$(SDKPATH)/third_party/exactle/ble-host/sources/stack/att
INCLUDES+= -I$(SDKPATH)/third_party/exactle/ble-profiles/sources/profiles/uribeacon
INCLUDES+= -I$(SDKPATH)/third_party/exactle/ble-profiles/sources/apps
INCLUDES+= -I$(SDKPATH)/third_party/exactle/ble-profiles/sources/profiles/gap

The exactle is cordio in SDK 2.5.1. This issue will cause the example compile fail.