uml: style fixes in arch/um/sys-x86_64

Style fixes in arch/um/sys-x86_64:
	updated copyrights
	CodingStyle fixes
	added severities to printks which needed them

A bunch of functions in sys-*/ptrace_user.c turn out to be unused, so they and
their declarations are gone.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/sys-x86_64/bug.c b/arch/um/sys-x86_64/bug.c
index a4360b5..e8034e3 100644
--- a/arch/um/sys-x86_64/bug.c
+++ b/arch/um/sys-x86_64/bug.c
@@ -5,7 +5,8 @@
 
 #include <linux/uaccess.h>
 
-/* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because
+/*
+ * Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because
  * that's not relevant in skas mode.
  */