intel/fsp_baytrail: Fix LPE initialization and enable ACPI mode

This change properly assigns resources to the LPE (Low Power Engine for
Audio) and enables ACPI mode.
lpe.c was copied from intel/baytrail with a few minor adjustment for the
different config structure.

ACPI mode requires setting LpeAcpiModeEnable=LPE_ACPI_MODE_ENABLED and
applying the patch that disables clearing gnvs.
https://review.coreboot.org/#/c/14040/

Change-Id: I3fff9aa158bde88e571082642d4f985a5ae1976e
Signed-off-by: Ben Gardner <gardner.ben@gmail.com>
Reviewed-on: https://review.coreboot.org/14041
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/intel/fsp_baytrail/chip.h

@@ -342,6 +342,10 @@ struct soc_intel_fsp_baytrail_config {
 	uint8_t  DIMMtFAW;
 	#define  DIMM_TFAW_DEFAULT	UPD_DEFAULT
 
+	/* LPE Audio Clock configuration. */
+	int lpe_codec_clk_freq; /* 19 or 25 are valid. */
+	int lpe_codec_clk_num; /* Platform clock pins. [0:5] are valid. */
+
 /* ***** ACPI configuration ***** */
 	/* Options for these are in src/arch/x86/include/arch/acpi.h */
 	uint8_t  fadt_pm_profile;