Enable Tianma panel in defconfig

Change-Id: Ifc9869180d2664b745e4354b7e3fa03c55646505
diff --git a/defconfig b/defconfig
index e03a4b9..0c1f1f6 100644
--- a/defconfig
+++ b/defconfig
@@ -30,3 +30,4 @@
 CONFIG_PCIEASPM_POWER_SUPERSAVE=y
 CONFIG_LOCALVERSION_AUTO=n
 CONFIG_IMX8MQ_PHANBELL_POWERSAVE=y
+CONFIG_DRM_PANEL_TIANMA_S6D6FP0A2=y