Return err code when a Ringbuffer is full or inaccessible

[drosen-taranawireless]

esp_rb_write_by_kernel() returns the number of bytes written; and it is called repeatedly until the entire length of the packet has been transferred. In the case of a full/inaccessible ringbuffer, it was returning zero, causing the caller to invoke the function in a tight loop. Fixed to return -EFAULT.

[mantriyogesh]

Hello @drosen-taranawireless

thank you for all your efforts and the solution to issue.
We will merge it in short time.

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