ASoC: mx27vis: Remove unused file

i.MX has been converted to a devicetree-only platform and
asoc-mx27vis.h is no longer used.

Get rid of this unused file.
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20210315193842.183042-1-festevam@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

include/linux/platform_data/asoc-mx27vis.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __PLATFORM_DATA_ASOC_MX27VIS_H
-#define __PLATFORM_DATA_ASOC_MX27VIS_H
-
-struct snd_mx27vis_platform_data {
-	int amp_gain0_gpio;
-	int amp_gain1_gpio;
-	int amp_mutel_gpio;
-	int amp_muter_gpio;
-};
-
-#endif /* __PLATFORM_DATA_ASOC_MX27VIS_H */