ALSA: hda: intel-nhlt: Move structs out of #define block

As functions prototypes regerdless of CONFIG options as well as some
code depend on structures defined in sound/intel-nhlt.h header, move
them out of #define block. This allows to compile code depending on
mentioned header with "depends on ACPI || COMPILE_TEST" in Kconfig.

Fixes: 47a1886a610a ("ASoC: Intel: avs: Enable AVS driver only on x86 platforms")
Reported-by: kernel test robot <[e-mail]>
Suggested-by: Pierre-Louis Bossart <[e-mail]>
Reviewed-by: Cezary Rojewski <[e-mail]>
Signed-off-by: Amadeusz Sławiński <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

include/sound/intel-nhlt.h

···
 	NHLT_DEVICE_INVALID
 };
 
-#if IS_ENABLED(CONFIG_ACPI) && IS_ENABLED(CONFIG_SND_INTEL_NHLT)
-
 struct wav_fmt {
 	u16 fmt_tag;
 	u16 channels;
···
 	NHLT_MIC_ARRAY_VENDOR_DEFINED = 0xf,
 };
 
+#if IS_ENABLED(CONFIG_ACPI) && IS_ENABLED(CONFIG_SND_INTEL_NHLT)
+
 struct nhlt_acpi_table *intel_nhlt_init(struct device *dev);
 
 void intel_nhlt_free(struct nhlt_acpi_table *addr);
···
 			     u8 num_ch, u32 rate, u8 dir, u8 dev_type);
 
 #else
-
-struct nhlt_acpi_table;
 
 static inline struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
 {