dts: arm: nxp: lpc: Added PWM to the peripheral node
dts: arm: nxp: lpc: Added PWM to the peripheral node

The LPC55s3x SOC comes with 2 FlexPWM peripherals each with 4 Sub-Modules.
Each Sub-Modules has 2 channels A && B.

Signed-off-by: Emilio Benavente <10c81cd03a1daae78f77b3a3b46301ccbf8eb663@nxp.com>

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