Create shared {En,Dis}ableSeq.conf components for rt5645 variants

Create shared {En,Dis}ableSeq.conf components for rt5645 variants

Factor out the common enable and disable sequences used
in rt5645 variants, including the rt5650. Move the sequences
into a new component directory codecs/rt5645/ along with
a Makefile.

Some lines like
    cset "name='Stereo1 ADC1 Mux' 1"
and
    cset "name='I2S2 Func Switch' on"
are not set set in the chtrt5650 UCM sequences and thus are not present
in the new component, in order to maximize reuse.

Signed-off-by: Russell Parker <russell.parker7@gmail.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>