__HAL_RESET_HANDLE_STATE macro

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This macro can be used for the following purpose: - When the Handle is declared as local variable; before passing it as parameter to HAL_PPP_Init() for the first time, it is mandatory to use this macro to set to 0 the Handle's "State" field. Otherwise, "State" field may have any random value and the first time the function HAL_PPP_Init() is called, the low level hardware initialization will be missed (i.e. HAL_PPP_MspInit() will not be executed). - When there is a need to reconfigure the low level hardware: instead of calling HAL_PPP_DeInit() then HAL_PPP_Init(), user can make a call to this macro then HAL_PPP_Init(). In this later function, when the Handle's "State" field is set to 0, it will execute the function HAL_PPP_MspInit() which will reconfigure the low level hardware.