defconfig: 8064: Enable GPIO based matrix keypad driver

MPQ8064 uses a 4x3 gpio matrix keypad over the IO expander.

Change-Id: Ie387671ea7949417290cbbc11609908c5341f4c4
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>
diff --git a/arch/arm/configs/msm8960_defconfig b/arch/arm/configs/msm8960_defconfig
index e18f0ea..cb935a2 100644
--- a/arch/arm/configs/msm8960_defconfig
+++ b/arch/arm/configs/msm8960_defconfig
@@ -276,6 +276,7 @@
 CONFIG_INPUT_EVDEV=y
 CONFIG_INPUT_EVBUG=m
 CONFIG_KEYBOARD_GPIO=y
+CONFIG_KEYBOARD_MATRIX=y
 CONFIG_KEYBOARD_PMIC8XXX=y
 CONFIG_INPUT_JOYSTICK=y
 CONFIG_JOYSTICK_XPAD=y