[Blackfin] arch: Update default config

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

diff --git a/arch/blackfin/configs/BF561-EZKIT_defconfig b/arch/blackfin/configs/BF561-EZKIT_defconfig
index 8546994..4d8a633 100644
--- a/arch/blackfin/configs/BF561-EZKIT_defconfig
+++ b/arch/blackfin/configs/BF561-EZKIT_defconfig
@@ -367,6 +367,7 @@
 # Power management options
 #
 # CONFIG_PM is not set
+# CONFIG_PM_WAKEUP_BY_GPIO is not set
 
 #
 # Networking