&& was obviously intended here.

Fixes: 6936e1f8 ('gpio: stmpe: Write int status register only when needed')
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NPatrice Chotard <patrice.chotard@st.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>