dt-bindings: mmc: fsl-imx-esdhc: Improve grammar and fix a typo

This makes the text read a little better.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230129130059.1322858-1-j.neuschaefer@gmx.net


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>