arm: Fix support_vector_misalignment.

In gcc-16-4314-g5e9eecc6686 I meant to remove all uses of TYPE
in support_vector_misalignment but apparently forgot this one.
Fixing by using the inner mode's size.

gcc/ChangeLog:

	* config/arm/arm.cc (arm_builtin_support_vector_misalignment):
	Remove use of type.

Author: Robin Dapp

gcc/config/arm/arm.cc

@@ -30667,7 +30667,7 @@ arm_builtin_support_vector_misalignment (machine_mode mode,
 {
   if (TARGET_NEON && !BYTES_BIG_ENDIAN && unaligned_access)
     {
-      HOST_WIDE_INT align = TYPE_ALIGN_UNIT (type);
+      HOST_WIDE_INT align = GET_MODE_UNIT_SIZE (mode);
 
       if (is_gather_scatter)
 	return true;