ACPI/IORT: Improve functions return type/storage class specifier indentation

Some functions definition indentations are using a style that is frowned
upon with return value type/storage class specifier in a separate line.

Reindent the function definitions to fix them.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Sudeep Holla <sudeep.holla@arm.com>