arm64: dts: qcom: qcs615-ride: Fix BT RFA supply name

arm64: dts: qcom: qcs615-ride: Fix BT RFA supply name

Fix up the supply name to align with bindings.

Reviewed-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260225-topic-wcn6855_pmu_dtbdings-v3-2-576ec5c4e631@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>