dt-bindings: crypto: fsl-imx-sahara: Shorten the title

In the title, there is no need to mention "included in some i.MX chips"
as it is too vague.

Remove it to make it simpler.

While at it, also remove the extra space in the first reg entry.

Signed-off-by: Fabio Estevam <festevam@denx.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>