nm: Add --quiet to suppress "no symbols" diagnostic

PR binutils/27408
	* readelf.c (quiet): New option flag.
	(enum long_option_values): New enum to hold long option value.
	(long_options): Add --quiet.
	(usage): Mention --quiet.
	(display_rel_file): If quiet is enabled, suppress "no symbols".
	(main): Handle the new option.
	* NEWS: Mention --quiet.
	* docs/binutils.texi: Document --quiet.

binutils/doc/binutils.texi

@@ -4741,6 +4741,7 @@ readelf [@option{-a}|@option{--all}]
         [@option{-s}|@option{--syms}|@option{--symbols}]
         [@option{--dyn-syms}|@option{--lto-syms}]
         [@option{--demangle@var{=style}}|@option{--no-demangle}]
+        [@option{--quiet}]
         [@option{--recurse-limit}|@option{--no-recurse-limit}]
         [@option{-n}|@option{--notes}]
         [@option{-r}|@option{--relocs}]
@@ -4822,6 +4823,10 @@ file.
 Displays the information contained in the file's segment headers, if it
 has any.
 
+@item --quiet
+@cindex quiet
+Suppress "no symbols" diagnostic.
+
 @item -S
 @itemx --sections
 @itemx --section-headers