ARM: dts: msm: update icnss device node for sdm660 and sdm630

Invalid min and max voltage configuration for the vdd-0.8-cx-mx
voltage regulator is causing smmu error after WLAN hardware reset.
To fix the above issue update the icnss wlan module vdd-0.8-cx-mx
regulator min and max voltage configuration value.

CRs-Fixed: 2175145
Change-Id: I293d1d3802c5a0bd3ba7244422ed46d16ef940b0
Signed-off-by: Sarada Prasanna Garnayak <sgarna@codeaurora.org>