This ensures that the build does not fail if the ssat and pkhbt
instructions are not available (armv5te and below).
Fixes: http://www.pulseaudio.org/ticket/790
In the assembly optimized versions of SSE, a noise could occur when the
number of channels were 3,5,6 or 7. For MMX and ARM, this could occur
when the number of channels were 3.
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
