[ARM] omap: fix a load of "warning: symbol 'xxx' was not declared. Should it be static?"

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/video/omap/lcdc.h b/drivers/video/omap/lcdc.h
index adb731e..8452222 100644
--- a/drivers/video/omap/lcdc.h
+++ b/drivers/video/omap/lcdc.h
@@ -4,4 +4,6 @@
 int omap_lcdc_set_dma_callback(void (*callback)(void *data), void *data);
 void omap_lcdc_free_dma_callback(void);
 
+extern const struct lcd_ctrl omap1_int_ctrl;
+
 #endif