ENGR00231773-1 ASRC: remove queue operation in ASRC driver

ENGR00231773-1 ASRC: remove queue operation in ASRC driver

According to ASRC memory->ASRC->memory requirement, driver should
satisfy the feature below: user application would passed into one buffer
and waiting until the output buffer is generated. In this case, only one
buffer is on processing and it is no necessary to use the queue to do
the convert. What is worse, queue operation would make the ASRC driver
hard to understand and maintain.

In this patch, remove the queue operation in ASRC driver.

Signed-off-by: Chen Liangjun <b36089@freescale.com>