ASoC: bolero: Set interpolation rate for IIR input

In rx macro set interpolation rate, sample rate and
bit width is not set if IIR is connected. Set sample
rate and bit width for IIR as well. Also correct
iir_inp_mux_text to follow same sequence as reg value.

Change-Id: I2e90265c066d38ccec9f47a6d25b8224ed710d2d
Signed-off-by: Vatsal Bucha <vbucha@codeaurora.org>