staging: rtlwifi: rtl8822be: Balance braces in else statement

Add braces to else statements to comply with section 3) of  'Linux
kernel coding style' and avoid the following checkpatch message:
'CHECK: Unbalanced braces around else statement'

Credits to checkpatch.

Signed-off-by: Frank A. Cancio Bello <frank@generalsoftwareinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>