Added upc logo and upc information

README.md

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 - Rodrigo Huerta ([@rodhuega]( https://github.com/rodhuega )) (UPC¹) 
 - Aurora Tomás ([@theatomb]( https://github.com/theatomb )) (UPC¹)
 <br/>
-¹ Universitat Politècnica de Catalunya (UPC) <br/>
+¹ Universitat Politècnica de Catalunya (UPC) ![](readme_data/logo-upc.png) <br/>
 
 ## **Chip layout**
 ![](readme_data/top-chip-layout.png)

caravel

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-Subproject commit 793bf634c2c1b1af90be95fcd85688e869bfb667
+Subproject commit c2943440e278814787f761585b99b9ea3c1f4121

readme_data/logo-upc.png

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