irda: w83977af_ir: Neaten pointer comparisons

Convert pointer comparisons to NULL.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joe Perches 2016-12-06 10:16:03 -08:00 • committed by David S. Miller
commit c947164698