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aml: define amlintmask and set it according to DSDT revision (64bit / 32bit)

--- a/sys/include/aml.h

+++ b/sys/include/aml.h

@@ -36,6 +36,7 @@

 void*		amlroot;

 int		amldebug;

+uvlong		amlintmask;

 #pragma	varargck	type	"V"	void*

 #pragma	varargck	type	"N"	void*

--- a/sys/src/9/pc/archacpi.c

+++ b/sys/src/9/pc/archacpi.c

@@ -495,6 +495,7 @@

 	for(i=0; i<ntblmap; i++){

 		t = tblmap[i];

 		if(memcmp(t->sig, "DSDT", 4) == 0){

+			amlintmask = (~0ULL) >> (t->rev <= 1)*32;

 			amlload(t->data, tbldlen(t));

 			break;

 		}

--- a/sys/src/cmd/scram.c

+++ b/sys/src/cmd/scram.c

@@ -69,8 +69,10 @@

 		t = realloc(t, sizeof(*t) + l);

 		if(readn(fd, t->data, l) != l)

 			return -1;

-		if(memcmp("DSDT", t->sig, 4) == 0)

+		if(memcmp("DSDT", t->sig, 4) == 0){

+			amlintmask = (~0ULL) >> (t->rev <= 1)*32;

 			amlload(t->data, l);

+		}

 		else if(memcmp("SSDT", t->sig, 4) == 0)

 			amlload(t->data, l);

 		else if(memcmp("FACP", t->sig, 4) == 0){

--- a/sys/src/libaml/aml.c

+++ b/sys/src/libaml/aml.c

@@ -296,7 +296,7 @@

 	uvlong *v;

 	v = mk('i', sizeof(uvlong));

-	*v = i;

+	*v = i & amlintmask;

 	return v;

 }

@@ -2138,6 +2138,9 @@

 	fmtinstall('V', Vfmt);

 	fmtinstall('N', Nfmt);

+

+	if(!amlintmask)

+		amlintmask = ~0ULL;

 	n = mk('N', sizeof(Name));

 	n->up = n;