x86: Code cleanup

Make the copyright notices in the x86 files consistent and update them with
proper attributions for recent updates

Also fix a few comment style/accuracy and whitespace/blank line issues

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
diff --git a/arch/i386/lib/pcat_interrupts.c b/arch/i386/lib/pcat_interrupts.c
index 67e6e97..364c435 100644
--- a/arch/i386/lib/pcat_interrupts.c
+++ b/arch/i386/lib/pcat_interrupts.c
@@ -1,9 +1,9 @@
 /*
  * (C) Copyright 2009
- * Graeme Russ, graeme.russ@gmail.com
+ * Graeme Russ, <graeme.russ@gmail.com>
  *
  * (C) Copyright 2002
- * Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
+ * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
  *
  * See file CREDITS for list of people who contributed to this
  * project.