defconfig: enable GPIO_SYSFS for sdxpoorwills-auto

Enable GPIO_SYSFS config option in sdxpoorwills-auto
defconfig files so that the gpios can be accessed
from user space.

Change-Id: I1ec064b8aad97de19d7f95836289230c4c561a57
Signed-off-by: Abinaya P <abinayap@codeaurora.org>