msm: 8064: Enable card detect for MPQ8064

MPQ8064 uses a different card detect GPIO. Enable
it.

Change-Id: I35c43c075d236fe808862840ddcbe300a67b6426
Signed-off-by: Oluwafemi Adeyemi <aadeyemi@codeaurora.org>
diff --git a/arch/arm/mach-msm/board-8064-pmic.c b/arch/arm/mach-msm/board-8064-pmic.c
index f915657..91fd400 100644
--- a/arch/arm/mach-msm/board-8064-pmic.c
+++ b/arch/arm/mach-msm/board-8064-pmic.c
@@ -126,6 +126,7 @@
 	PM8921_GPIO_INPUT(38, PM_GPIO_PULL_UP_30),
 	/* TABLA CODEC RESET */
 	PM8921_GPIO_OUTPUT(34, 1, MED),
+	PM8921_GPIO_INPUT(31, PM_GPIO_PULL_NO),
 };
 
 static struct pm8xxx_gpio_init pm8921_mtp_kp_gpios[] __initdata = {