staging: rtl8188eu: refactor Efuse_GetCurrentSize()

Refactor while loop in Efuse_GetCurrentSize() to reduce indentation
level and clear line over 80 characters checkpatch warnings.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200329100450.10126-1-straube.linux@gmail.com


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