staging: rtl8723bs: Merge assignment with return

Merge assignment with return statement to directly return the value.
Done using following coccinelle semantic patch

@@
local idexpression ret;
expression e;
@@

-ret =
+return
     e;
-return ret;

Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>