pcmdec: Increase output buffer size to 3.75 KB.
pcmdec: Increase output buffer size to 3.75 KB.

It was previously 320 bytes, which is well suited for 8000 Hz, 16 bits
mono as it provides 20 ms worth of audio. For stereo 48000 Hz,
however, this output buffer needs to be larger; 3840 bytes gives 20 ms
of stereo, 16-bits, 48000 Hz audio.

Signed-off-by: Daniel Diaz <ed054987dd20aebbd314fbb0d175066628f13717@ti.com>

mrchapp/libgoo