defconfig: arm64: Enable USB DIAG driver

This change enables USB DIAG driver used for diagnostics
functionalty on QTI MSM platform.

Change-Id: I61ac7457416f8ba50254aa4686e0c62e9e1b4d89
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
diff --git a/arch/arm64/configs/msmskunk-perf_defconfig b/arch/arm64/configs/msmskunk-perf_defconfig
index d39d456..abce231 100644
--- a/arch/arm64/configs/msmskunk-perf_defconfig
+++ b/arch/arm64/configs/msmskunk-perf_defconfig
@@ -294,6 +294,7 @@
 CONFIG_USB_CONFIGFS_MASS_STORAGE=y
 CONFIG_USB_CONFIGFS_F_FS=y
 CONFIG_USB_CONFIGFS_F_HID=y
+CONFIG_USB_CONFIGFS_F_DIAG=y
 CONFIG_MMC=y
 CONFIG_MMC_BLOCK_MINORS=32
 CONFIG_MMC_TEST=y