asoc: bolero: enable swr DMIC clk_div after tx mclk is enabled

If swr DMIC clk_div is enabled before enabling tx mclk and LPASS
power collapse happens, volatile swr DMIC clk_div registers would
be cleared and swr DMIC would not work. Make this change to enable
swr DMIC clk_div after tx mclk is enabled

Change-Id: Ie9e7e8c74dc0e013898f3fd8b62344a670ad6664
Signed-off-by: Meng Wang <mengw@codeaurora.org>