Staging: rtl8192e: Rename function pointer SetHwRegHandler()

Rename function pointer SetHwRegHandler to set_hw_reg_handler to fix
checkpatch warning Avoid CamelCase.

Signed-off-by: Tree Davies <tdavies@darkphysics.net>
Link: https://lore.kernel.org/r/20240126223106.986093-6-tdavies@darkphysics.net


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