lib: at91: Add logo files used via API of DM_VIDEO

In order to display the company's logo via the API of DM_VIDEO,
and add the logo files of both Atmel and Microchip.

Signed-off-by: Wenyou Yang <wenyou.yang@microchip.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/Makefile b/lib/Makefile
index 15bba9e..faf4538 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -16,6 +16,7 @@
 obj-$(CONFIG_FIT) += libfdt/
 obj-$(CONFIG_OF_LIVE) += of_live.o
 obj-$(CONFIG_CMD_DHRYSTONE) += dhry/
+obj-$(CONFIG_ARCH_AT91) += at91/
 
 obj-$(CONFIG_AES) += aes.o
 obj-y += charset.o