ARM: dts: vf610: Add missing QuadSPI register mapping and names.

Both 'reg' and 'reg-names' are required properties according to binding
documentation, and both should contain two items.

Signed-off-by: Cory Tusar <cory.tusar@pid1solutions.com>
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>