um: get rid of pointless include "..." where include <...> will do

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
diff --git a/arch/um/sys-ppc/ptrace_user.c b/arch/um/sys-ppc/ptrace_user.c
index 224d240..4601b92 100644
--- a/arch/um/sys-ppc/ptrace_user.c
+++ b/arch/um/sys-ppc/ptrace_user.c
@@ -1,6 +1,6 @@
 #include <errno.h>
 #include <asm/ptrace.h>
-#include "sysdep/ptrace.h"
+#include <sysdep/ptrace.h>
 
 int ptrace_getregs(long pid, unsigned long *regs_out)
 {