arm64: dts: qcom: sdm845-xiaomi-beryllium: Mark l1a regulator as powered during boot

arm64: dts: qcom: sdm845-xiaomi-beryllium: Mark l1a regulator as powered during boot

The regulator must be on, since it provides the display subsystem and
therefore the bootloader had turned it on before Linux booted.

Fixes: 77809cf74a8c ("arm64: dts: qcom: Add support for Xiaomi Poco F1 (Beryllium)")
Signed-off-by: David Heidelberg <david@ixit.cz>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260320-beryllium-booton-v2-1-931d1be21eae@ixit.cz
Signed-off-by: Bjorn Andersson <andersson@kernel.org>