FROMLIST: arm64: configs: Update defconfig for DSI-LVDS bridge support

Enable the LT9211 bridge driver to support DSI-to-LVDS conversion
on the Qualcomm RB3GEN2 Industrial Kit.

Signed-off-by: Gopi Botlagunta <venkata.botlagunta@oss.qualcomm.com>
Co-developed-by: Yi Zhang <zhanyi@qti.qualcomm.com>
Signed-off-by: Yi Zhang <zhanyi@qti.qualcomm.com>
Link: https://lore.kernel.org/lkml/20260130-add-lt9211c-bridge-for-rb3gen2-industrial-mezzanine-v2-2-a98714fa1531@oss.qualcomm.com/

Author: quic-botlagun

arch/arm64/configs/defconfig

@@ -954,6 +954,7 @@ CONFIG_DRM_FSL_LDB=m
 CONFIG_DRM_ITE_IT6263=m
 CONFIG_DRM_LONTIUM_LT8713SX=m
 CONFIG_DRM_LONTIUM_LT8912B=m
+CONFIG_DRM_LONTIUM_LT9211=m
 CONFIG_DRM_LONTIUM_LT9611=m
 CONFIG_DRM_LONTIUM_LT9611UXC=m
 CONFIG_DRM_ITE_IT66121=m