Infra 3836 - Add SAM IoT 2020 promo ad image

Signed-off-by: Eric Poirier <eric.poirier@eclipse-foundation.org>
diff --git a/promo/images/sam_iot_2020_register.png b/promo/images/sam_iot_2020_register.png
new file mode 100644
index 0000000..ba7cd34
--- /dev/null
+++ b/promo/images/sam_iot_2020_register.png
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