lcd: JZ4750: Include asm/irq.h instead of asm/mach-jz4750d/jz4750d_intc.h
MIPS: JZ4750D: Get rid of asm/mach-jz4750d/jz4750d_intc.h where possible
MIPS: JZ4750D: Get rid on jz4750d_intc.h include for rzx50 and a320e
asoc: JZ4750: Make alsa sound work.

Sound is working in principle, but there are occasional kernel panics
in audio_start_dma() because of invalid pointer (presumably aic_buf)

TODO:
 - eliminate sound pops on codec activation
 - check routes

This is a squashed commit from jz-3.15-asoc branch up to 2014-10-26