rtlwifi: rtl8192cu: Fix problems with blank lines

The following problems were found:

WARNING: Missing a blank line after declarations
CHECK: Please don't use multiple blank lines
CHECK: Please use a blank line after function/struct/union/enum declarations

There are no code changes.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>