lib/cmdline: adjust a few comments to fix kernel-doc -Wreturn warnings

Fix 'get_option()', 'memparse()' and 'parse_option_str()' comments to
match the commonly used style as suggested by kernel-doc -Wreturn.

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Dmitry Antipov <[email protected]>
Suggested-by: Andy Shevchenko <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Alexandre Ghiti <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Cc: Charlie Jenkins <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

lib/cmdline.c

@@ -43,7 +43,7 @@ static int get_range(char **str, int *pint, int n)
  *	When @pint is NULL the function can be used as a validator of
  *	the current option in the string.
  *
- *	Return values:
+ *	Return:
  *	0 - no int in string
  *	1 - int found, no subsequent comma
  *	2 - int found including a subsequent comma
@@ -145,6 +145,9 @@ EXPORT_SYMBOL(get_options);
  *
  *	Parses a string into a number.  The number stored at @ptr is
  *	potentially suffixed with K, M, G, T, P, E.
+ *
+ *	Return: The value as recognized by simple_strtoull() multiplied
+ *	by the value as specified by suffix, if any.
  */
 
 unsigned long long memparse(const char *ptr, char **retptr)
@@ -205,7 +208,7 @@ EXPORT_SYMBOL(memparse);
  *	This function parses a string containing a comma-separated list of
  *	strings like a=b,c.
  *
- *	Return true if there's such option in the string, or return false.
+ *	Return: True if there's such option in the string or false otherwise.
  */
 bool parse_option_str(const char *str, const char *option)
 {