powerpc: Fix ptrace buffer size for VSX

Fix cut-and-paste error in the size setting for ptrace buffers for VSX.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 6b66cd8..97d5ded 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -975,15 +975,13 @@
 	case PTRACE_GETVSRREGS:
 		return copy_regset_to_user(child, &user_ppc_native_view,
 					   REGSET_VSX,
-					   0, (32 * sizeof(vector128) +
-					       sizeof(u32)),
+					   0, 32 * sizeof(double),
 					   (void __user *) data);
 
 	case PTRACE_SETVSRREGS:
 		return copy_regset_from_user(child, &user_ppc_native_view,
 					     REGSET_VSX,
-					     0, (32 * sizeof(vector128) +
-						 sizeof(u32)),
+					     0, 32 * sizeof(double),
 					     (const void __user *) data);
 #endif
 #ifdef CONFIG_SPE