Add Single Element Vectors support

[aldyh@redhat.com]

>>>>> "Nick" == Nick Clifton <nickc@redhat.com> writes:

 > Hi Guys,
 >   With approval from Richard Henderson I am checking in the patch
 >   below.  It adds support for a single element, 64-bit vector type
 >   (V1DImode).=A0 This type is needed by the Motorola e500 part which has
 >   a vector processor that includes support for objects for this type,
 >   and which are not handled by the same registers as an ordinary
 >   DImode variable.

Where are the e500 bits?

Aldy