ARM: dts: msm: Move USB3 interrupt overrides back to top-level msm8974

Several of the msm8974 v2-based board DTS files contain the exact
same definition of the override for &usb3 whose sole purpose is to
add an additional interrupt to support the PM8941 MISC peripheral
interrupt for ID pin detection.

Since commit ad4a0282 (usb: dwc3-msm: only request PMIC USB ID
interrupt if available), there is now runtime support to detect
if this interrupt is available or not, so we no longer need this
override littering a bunch of board DTS files. Let's move the
pmic_id_irq to the top-level msm8974.dtsi SoC file.

Change-Id: If857950fbb26447f21a795e54e7adbc77ada0e56
Signed-off-by: Jack Pham <jackp@codeaurora.org>