staging: r8188eu: reformat long computation lines

Reformat long running computation instructions to improve code readability.
Address checkpatch script complaints like:
	CHECK: line length of 171 exceeds 100 columns

Signed-off-by: Deepak R Varma <drv@mailo.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/e07506ef1dc4ac1d3f8b076a8182628bd0e5cec0.1666299151.git.drv@mailo.com


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