ACPICA: Object dump routines: Use common function for string output

For ACPI string objects, always use the common string dump
function, acpi_ut_print_string. This function surrounds the string
with quotes and handles allowed escape sequences.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>