Update RH850 U2x resource references (#33)

* Add demo project for RH850 CCRH U2x and GHS U2x

* Added new Demo projects for RH850 U2Cx CCRH and GHS.

* Due to internal constraint, we need to postpone the upstream. We will resume once it will be ready

* Due to internal constraint, we need to postpone the upstream. We will resume once it will be ready

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Co-authored-by: Duc Dat Le <duc.le.xm@renesas.com>
Co-authored-by: vung.tran.zg <vung.tran.zg@renesas.com>

Author: 3 people