dt-bindings: mtd: add sst25wf040b and en25s64 to sip-nor list

The chip sst25wf040b and en25s64 are compatible with SPI NOR flash.
Signed-off-by: Yuan Yao <yao.yuan@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt

@@ -13,6 +13,7 @@ Required properties:
                  at25df321a
                  at25df641
                  at26df081a
+                 en25s64
                  mr25h256
                  mr25h10
                  mr25h40
@@ -31,6 +32,7 @@ Required properties:
                  s25fl008k
                  s25fl064k
                  sst25vf040b
+                 sst25wf040b
                  m25p40
                  m25p80
                  m25p16