Deletion of RX microcontroller family

Comment: to Renesas Electronics where it is mentioned. I was unable to find much independent sourcing for this line of microcontrollers. Basic facts about the RX line are verifiable, hence a selective merge to Renesas Electronics is a reasonable alternative to deletion per our policy . --&#123;&#123;u&#124
Stance: merge
Cited policy: Wikipedia:Deletion policy (WP:ATD)