Remove ${objtree}/include/asm/proc/ link

mkconfig links ${objtree}/include/asm/proc/ to
${srctree}/arch/${arch}/include/asm/proc-armv/. This seems to be a
remnant from the past. Ever since its introduction in 2003 it is used
only in ARM build and always links to same place, so let's simplify
the code, remove it and reference directly where needed.

Successful MAKEALL for ARM and PowerPC verified on Linux.

Signed-off-by: Vasili Galka <vvv444@gmail.com>
diff --git a/arch/arm/include/asm/ptrace.h b/arch/arm/include/asm/ptrace.h
index 73c9087..a836f6c 100644
--- a/arch/arm/include/asm/ptrace.h
+++ b/arch/arm/include/asm/ptrace.h
@@ -11,7 +11,7 @@
 /* options set using PTRACE_SETOPTIONS */
 #define PTRACE_O_TRACESYSGOOD	0x00000001
 
-#include <asm/proc/ptrace.h>
+#include <asm/proc-armv/ptrace.h>
 
 #ifndef __ASSEMBLY__
 #define pc_pointer(v) \