drivers: irqchip: enable PDC irqchip for QCOM Lahaina SoC

Enable PDC irqchip for Qualcomm's Lahaina SoC. Increase the maximum
number of PDC pins to match the hardware.

Change-Id: I1c80d4c81c63a66c2a8dbf854e403b4b8c687060
Signed-off-by: Lina Iyer <ilina@codeaurora.org>