alsa-utils: put 'select' after 'bool'

In the definitions of the alsa-utils sub-options, the 'select' were
before the 'bool', which is unusual and does not follow how we do
things in general in Buildroot. This commit fixes that for all
alsa-utils suboptions.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>