configurations: change naming for Nuvoton NPCM8xx EVB

`Arbel` naming is the SOC itself, change to use `EVB` naming.

- Rename nuvoton_arbel_bmc.json in configurations
- Update meson.build

Change-Id

configurations: change naming for Nuvoton NPCM8xx EVB

`Arbel` naming is the SOC itself, change to use `EVB` naming.

- Rename nuvoton_arbel_bmc.json in configurations
- Update meson.build

Change-Id: I0449a830f773b1959a0e7bbc3aa0da61ba00659e
Signed-off-by: Tim Lee <timlee660101@gmail.com>

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