Staging: iio: meter: ade7753: Fixed checkpatch.pl warnings

Clean-up patch to fix the following checkpatch.pl warnings:

ade7753.c:325: WARNING: Missing a blank line after declarations
ade7753.c:383: WARNING: Missing a blank line after declarations

Signed-off-by: Tina <Johnson&lt;tinajohnson.1234@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>