arm64: dts: qcom: ipq6018: correct TCSR block area

According to Bjorn Andersson[1], &tcsr_q6 base is 0x01937000 with size
0x21000. Adjust qcom,halt-regs offsets (add 0xe000) to match the new
syscon base.

Also, rename to just &tcsr as Kathiravan T suggested.

[1] https://lore.kernel.org/r/YLgO0Aj1d4w9EcPv@yoga

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Link: https://lore.kernel.org/r/889aae1b88f120cb6281919d27164a959fbe69d0.1626948070.git.baruch@tkos.co.il
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>