staging: r8188eu: convert type of HalData in struct adapter

adapter->HalData is used in the GET_HAL_DATA macro all across the
driver code but nobody checks if its allocation in
rtl188eu_alloc_haldata() was successful or not.

To avoid errors when the allocation fails convert the type of field
HalData from void pointer to struct hal_data_8188eu. Remove
GET_HAL_DATA, rtl8188eu_alloc_haldata(), rtl8188e_free_hal_data().

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20211207140405.8673-1-straube.linux@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>