ain.c:542: warning: unused variable `pdev'

Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Acked-by: Michael H. Warfield <mhw@WittsEnd.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

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