ARM: multi_v7_defconfig: add ST Keyscan driver

This patch adds KEYBOARD_ST_KEYSCAN config
Signed-off-by: NGabriel Fernandez <gabriel.fernandez@linaro.org>
Acked-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NMaxime Coquelin <maxime.coquelin@st.com>

arch/arm/configs/multi_v7_defconfig

@@ -155,6 +155,7 @@ CONFIG_INPUT_EVDEV=y
 CONFIG_KEYBOARD_GPIO=y
 CONFIG_KEYBOARD_TEGRA=y
 CONFIG_KEYBOARD_SPEAR=y
+CONFIG_KEYBOARD_ST_KEYSCAN=y
 CONFIG_KEYBOARD_CROS_EC=y
 CONFIG_MOUSE_PS2_ELANTECH=y
 CONFIG_INPUT_MISC=y