staging: r8188eu: move firmware loading code out of the hal layer

Move the firmware loading functions from rtl8188e_hal_init.c into the
new file core/rtw_fw.c.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20220107103620.15648-20-straube.linux@gmail.com


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