ArmPkg: ArmScmiDxe - convert .h to from 8859-x to 7-bit

ArmPkg: ArmScmiDxe - convert .h to from 8859-x to 7-bit

A paragraph sign in a comment came from some ISO8859 encoding,
convert it to the word "section" to remain 7-bit safe, since we're
not actually doing anything special.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: "Kinney, Michael D" <michael.d.kinney@intel.com>
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>