drivers: gpio_atmel: Fix erronous if statement

The GPIO_INT_LEVEL value is zero so the mask assignement
is never executed. Using the bit complement GPIO_INT_EDGE
the proper mask is assigned

This issue was reported by Coverity

Coverity-CID: 151966

Change-Id: Iacfeb6466388023bd6123ba86280aa9ca15f34e4
Signed-off-by: Sergio Rodriguez <sergio.sf.rodriguez@intel.com>
1 file changed