dmaengine: ti: edma: Remove some unused functions

dmaengine: ti: edma: Remove some unused functions

These functions are defined in the edma.c file, but not called elsewhere,
so delete these unused functions.

drivers/dma/ti/edma.c:746:31: warning: unused function 'to_edma_cc'.
drivers/dma/ti/edma.c:420:20: warning: unused function 'edma_param_or'.
drivers/dma/ti/edma.c:414:20: warning: unused function 'edma_param_and'.
drivers/dma/ti/edma.c:402:20: warning: unused function 'edma_param_write'.
drivers/dma/ti/edma.c:373:28: warning: unused function 'edma_shadow0_read'.
drivers/dma/ti/edma.c:396:28: warning: unused function 'edma_param_read'.
drivers/dma/ti/edma.c:355:20: warning: unused function 'edma_or_array'.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2152
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20220914101943.83929-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>