ACPICA: Comment updates - no functional change.

Change all instances of "sub-table" to "subtable" for
consistency.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 212c65d..4ad7da8 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -675,7 +675,7 @@
 };
 
 /*
- * MADT Sub-tables, correspond to Type in struct acpi_subtable_header
+ * MADT Subtables, correspond to Type in struct acpi_subtable_header
  */
 
 /* 0: Processor Local APIC */
@@ -918,7 +918,7 @@
 };
 
 /*
- * SRAT Sub-tables, correspond to Type in struct acpi_subtable_header
+ * SRAT Subtables, correspond to Type in struct acpi_subtable_header
  */
 
 /* 0: Processor Local APIC/SAPIC Affinity */