arm64: dts: qcom: qcm6490-fairphone-fp5: Add supplies to simple-fb node

arm64: dts: qcom: qcm6490-fairphone-fp5: Add supplies to simple-fb node

Add the OLED power supplies to the simple-framebuffer node, so that
the regulators don't get turned off while the simple-fb is being used.

Fixes: c365a026155c ("arm64: dts: qcom: qcm6490-fairphone-fp5: Enable display")
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250930-sc7280-dts-misc-v1-1-5a45923ef705@fairphone.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>