gpio: dwapb: Get rid of unnecessary conjunction over 32-bit value

When we mask interrupts before sleep, there is no need to have a conjunction
with 0xffffffff since the accepted by dwapb_write() value is 32-bit.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Cc: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20200422110654.23442-1-andriy.shevchenko@linux.intel.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>