ASoC: codecs: lpass-rx-macro: remove unused struct 'rx_macro_reg_mask_val'

'rx_macro_reg_mask_val' is unused since the original
commit af3d54b9 ("ASoC: codecs: lpass-rx-macro: add support for
lpass rx macro").

Remove it.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Link: https://msgid.link/r/20240601225446.183505-2-linux@treblig.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/lpass-rx-macro.c

@@ -463,12 +463,6 @@ static const struct comp_coeff_val comp_coeff_table[HPH_MODE_MAX][COMP_MAX_COEFF
 	},
 };
 
-struct rx_macro_reg_mask_val {
-	u16 reg;
-	u8 mask;
-	u8 val;
-};
-
 enum {
 	INTERP_HPHL,
 	INTERP_HPHR,