Merge changes Ifc373f95,I95eb887a,I1e6be2ab,Ia6ea939a,I147d0138, ... into klp-modular-dev

* changes:
  Make all warnings fatal compilation errors
  Major warnings cleanup
  Add macro UNUSED() to bt_utils.h
  Fix unused parameter warning in static function
  Add "static" to a static function
  Fix a number of unused parameter warnings in static functions
  Fix bug with wrong parameter passed to logu
  Default send_ind_evt should be FALSE
  Fix warning "implicit declaration of function 'GAP_BleReadPeerPrefConnParams'"
  Fix unused parameter warnings in static functions by changing prototype
  Fix some unused parameter warnings in static functions
  Fix warnings about implicit declaration of bdcmp and bdcpy
  Fix warning "comparison is always true due to limited range of data type"
  Fix warning "suggest braces around empty body in an 'if' statement"
  Fix warning "comparison is always true due to limited range of data type"
  Add a function prototype for btm_ble_test_command_complete
  Change argument to return ptr rather than assign to unused local
  Fix warning "comparison is always true due to limited range of data type"
  Fix warnings about implicit declarations
  Fix warning "implicit declaration of function 'bdcmp'"
  Fix warning "case label value exceeds maximum value for type"
  Fix missing initializer warning
  Fix missing initializer warning
  Fix warning about missing initializer