Document no new changes to pirtable.c, mptable.c, acpi.c, and smbios.c.

Add a note to the code that generates the pir, mptable, smbios, and
smbios tables that no new changes are expected.  Going forward, it is
expected that if any changes are needed to these bios tables that
SeaBIOS will get the tables passed in from upstream.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

src/fw/acpi.c

@@ -1,4 +1,5 @@
 // Support for generating ACPI tables (on emulators)
+// DO NOT ADD NEW FEATURES HERE.  (See paravirt.c / biostables.c instead.)
 //
 // Copyright (C) 2008-2010  Kevin O'Connor <kevin@koconnor.net>
 // Copyright (C) 2006 Fabrice Bellard

src/fw/mptable.c

@@ -1,4 +1,5 @@
 // MPTable generation (on emulators)
+// DO NOT ADD NEW FEATURES HERE.  (See paravirt.c / biostables.c instead.)
 //
 // Copyright (C) 2008-2010  Kevin O'Connor <kevin@koconnor.net>
 // Copyright (C) 2006 Fabrice Bellard

src/fw/pirtable.c

@@ -1,4 +1,5 @@
 // PIR table generation (for emulators)
+// DO NOT ADD NEW FEATURES HERE.  (See paravirt.c / biostables.c instead.)
 //
 // Copyright (C) 2008  Kevin O'Connor <kevin@koconnor.net>
 // Copyright (C) 2002  MandrakeSoft S.A.

src/fw/smbios.c

@@ -1,4 +1,5 @@
 // smbios table generation (on emulators)
+// DO NOT ADD NEW FEATURES HERE.  (See paravirt.c / biostables.c instead.)
 //
 // Copyright (C) 2008,2009  Kevin O'Connor <kevin@koconnor.net>
 // Copyright (C) 2006 Fabrice Bellard