ShellPkg: acpiview: Remove duplicate indentation in IORT parser

ShellPkg: acpiview: Remove duplicate indentation in IORT parser

Remove redundant whitespace characters at the beginning of the strings
describing IORT table field names.

When dumping ACPI table contents, the indentation level for printing
field names is controled using the 'Indent' argument to the 'ParseAcpi'
function. In the IORT acpiview parser, both 'Indent' and extra
whitespace characters are used for indentation, which results in
excess indentation.

Signed-off-by: Krzysztof Koch <krzysztof.koch@arm.com>
Reviewed-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Reviewed-by: Zhichao Gao <zhichao.gao@intel.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>