common: Drop asm/ptrace.h from common header

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/powerpc/cpu/mpc85xx/interrupts.c b/arch/powerpc/cpu/mpc85xx/interrupts.c
index e9da9c0..4ad7626 100644
--- a/arch/powerpc/cpu/mpc85xx/interrupts.c
+++ b/arch/powerpc/cpu/mpc85xx/interrupts.c
@@ -21,6 +21,7 @@
 #ifdef CONFIG_POST
 #include <post.h>
 #endif
+#include <asm/ptrace.h>
 
 void interrupt_init_cpu(unsigned *decrementer_count)
 {