staging: rtl8192e: add spaces around binary operators

Use spaces around binary operators as suggested by Linux kernel coding
style guidelines.
Issues reported by checkpatch.pl for the following binary operators:
	+ , - , * , | , <<

Signed-off-by: Khadija Kamran <kamrankhadijadj@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/44a545cf8e99ebfdbfc3f5bb314f3828abe98558.1679696777.git.kamrankhadijadj@gmail.com


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