atmel: common: Add function to display via DM_VIDEO's API

Add a function to display the company's logo and board information
via the API from DM_VIDEO. This function can be shared by other
atmel boards, so locate it in board/atmel/common folder.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/atmel/common/Makefile b/board/atmel/common/Makefile
index 6d9c685..8a6850b 100644
--- a/board/atmel/common/Makefile
+++ b/board/atmel/common/Makefile
@@ -8,4 +8,5 @@
 obj-y += board.o
 ifndef CONFIG_SPL_BUILD
 obj-$(CONFIG_I2C_EEPROM) += mac_eeprom.o
+obj-$(CONFIG_DM_VIDEO) += video_display.o
 endif