We don't need the memory barriers here and an interrupt handler should
be as fast as possible. Therefore switch to readl_relaxed.
Signed-off-by: NHeiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: NNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: NSean Young <sean@mess.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>