ACPICA: utilities: fix sprintf()

This contains changes for the following ACPICA commit ID's:
8f99a6ccd3b8e5c3d3d68c53fdbb054c2477eeb4
d30647af53abd334cbcf6362387464ea647bac9e
d3c5fb4cf5b2880d789c987eb847fc3de3774abc

On 32-bit, the provided sprintf() is non-functional: with a size of
ACPI_UINT32_MAX, String + Size will wrap, meaning End < Start, and
acpi_ut_bound_string_output() will never output anything as a result.

The symptom we saw of this was acpixtract failing to output anything.

Link: acpica/acpica@8f99a6cc
Link: acpica/acpica@d30647af
Link: acpica/acpica@d3c5fb4c
Signed-off-by: MSathieu <[email protected]>
Signed-off-by: John Levon <[email protected]>
Signed-off-by: Bob Moore <[email protected]>
Signed-off-by: Erik Kaneda <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

drivers/acpi/acpica/utprint.c

@@ -332,7 +332,12 @@ int vsnprintf(char *string, acpi_size size, const char *format, va_list args)
 	int i;
 
 	pos = string;
-	end = string + size;
+
+	if (size != ACPI_UINT32_MAX) {
+		end = string + size;
+	} else {
+		end = ACPI_CAST_PTR(char, ACPI_UINT32_MAX);
+	}
 
 	for (; *format; ++format) {
 		if (*format != '%') {