ARM: OMAP: Fix sx1 build failure

Patch from Vladimir Ananiev.

sound/arm/omap/omap-alsa-sx1.c:32: error: `CN_IDX_SX1SND' undeclared
here (not in a function)
sound/arm/omap/omap-alsa-sx1.c:32: error: initializer element is not constant
sound/arm/omap/omap-alsa-sx1.c:32: error: (near initialization for
                                           `cn_sx1snd_id.idx')
sound/arm/omap/omap-alsa-sx1.c:32: error: `CN_VAL_SX1SND' undeclared
here (not in a function)
sound/arm/omap/omap-alsa-sx1.c:32: error: initializer element is not constant
sound/arm/omap/omap-alsa-sx1.c:32: error: (near initialization for
                                           `cn_sx1snd_id.val')

Signed-off-by: Komal Shah <komal_shah802003@yahoo.com>
Signed-off-by: Vladimir Ananiev <vovan888@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>