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Add serial, i2c, bam, spi, qpic peripheral nodes.

While here, fix the PMU node's irq trigger to avoid
the boot warnings from GIC.
Reviewed-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Sricharan R <sricharan@codeaurora.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>