asoc: codecs: bolero: Add support to disable aux hpf

Add a mixer control which can allow for aux hpf
to be either enabled or disabled based on its switch
settings.

Change-Id: Ie300c89e1e2f3669846d6bab250b7f4da4a7632a
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>