ARM: dts: qcom: msm8226-motorola-falcon: limit TPS65132 to 5.4V

After some digging in downstream sources, it was found that the TPS65132
outputs are fixed to +5.4V and -5.4V respectively. This is further confirmed
on runtime through debugfs, the troubleshooting guide confirms this as well.
Specify these limits as such.

Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Link: https://lore.kernel.org/r/b67ed6c7813fa52cf00b473dded9b5042102f593.1746711762.git.stano.jakubek@gmail.com


Signed-off-by: Bjorn Andersson <andersson@kernel.org>