arm64: dts: qcom: qcm2290: Enable HS eMMC timing modes

arm64: dts: qcom: qcm2290: Enable HS eMMC timing modes

The host controller supports HS200/HS400 and HS400 enhanced strobe mode.
On RB1, this improves Linux eMMC read speed, from ~170MB/s to 300MB/s.

Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250728093426.1413379-1-loic.poulain@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>