nvadsp: AMC and AMISC changes for multi-instance

- With multiple ADSPs in use, only one of them may configure AMC,
    so use amc_not_avlbl flag to skip reg parsing, if not needed
 - Unify reg enums for ADSP and AON; this means that reg DT prop
    for AON should have a dummy first entry (against AMC)
 - Remove adsp_prid from chip data, as AMISC base in reg DT prop
    will be offset as per the ADSP instance

Bug 3682950
Bug 4165898

Change-Id: Ic6068aeeb7bbb3540cad36371a6715f8b43ee8b6
Signed-off-by: Viswanath L <viswanathl@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/3106899
Reviewed-by: svcacv <svcacv@nvidia.com>
Reviewed-by: Dara Ramesh <dramesh@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>

drivers/platform/tegra/nvadsp/dev.h

@@ -25,15 +25,12 @@
 enum {
 	AMC,
 	AMISC,
+	AO_MISC = AMISC,
 	AHSP,
+	AON_HSP = AHSP,
 	APE_MAX_REG
 };
 
-enum {
-	AO_MISC,
-	AON_HSP,
-	AON_MAX_REG,
-};
 /*
  * Note: These enums should be aligned to the adsp_mem node mentioned in the
  * device tree
@@ -159,10 +156,8 @@ struct nvadsp_chipdata {
 	bool			amc_err_war;
 	u32			chipid_ext;
 
-	u32			adsp_prid;
 	char			*adsp_elf;
 	size_t                  num_irqs;
-	size_t                  num_regs;
 };
 
 /* Maximum number of LOAD MAPPINGS supported */