redhat/configs: Enable CONFIG_NVIDIA_WMI_EC_BACKLIGHT for both Fedora and RHEL
https://bugzilla.redhat.com/show_bug.cgi?id=2221211
Enable NVidia WMI EC backlight control for Fedora and RHEL.
Test: Dell tested on Precision 7780 laptop
Signed-off-by: Kate Hsuan hpa@redhat.com