Mahavir Jain b2a1a79eb4 i2s: fix issue in dma descriptor allocation if SPIRAM is enabled ...

It has been observed that, if external SPIRAM is enabled, then under
certain scenarios (e.g. internal memory being too much fragmented),
I2S tx/rx descriptors can land in external SPIRAM and hence resulting
in failure in DMA. Adding explicit capability to allocate in only DMA
capable memory.

Signed-off-by: Mahavir Jain <mahavir@espressif.com>

2018-05-10 18:26:01 +05:30

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