defconfig: msm: Enable serial using character device for msm8953

For MSM8953 enable the serial function using character
devices.

Change-Id: I7b6bda49aa4081ef3bda5cf2841c924378eb5db2
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>
diff --git a/arch/arm64/configs/msm8953_defconfig b/arch/arm64/configs/msm8953_defconfig
index ede64f0..0067cd8 100644
--- a/arch/arm64/configs/msm8953_defconfig
+++ b/arch/arm64/configs/msm8953_defconfig
@@ -439,6 +439,7 @@
 CONFIG_USB_CONFIGFS_UEVENT=y
 CONFIG_USB_CONFIGFS_F_HID=y
 CONFIG_USB_CONFIGFS_F_DIAG=y
+CONFIG_USB_CONFIGFS_F_CDEV=y
 CONFIG_USB_CONFIGFS_F_QDSS=y
 CONFIG_MMC=y
 CONFIG_MMC_PERF_PROFILING=y