genksyms: rename cvar_qualifier to type_qualifier

I believe "cvar" stands for "Const, Volatile, Attribute, or Restrict".

This is called "type-qualifier" in K&R. [1]

Adopt this more generic naming.

No functional changes are intended.

[1] https://cs.wmich.edu/~gupta/teaching/cs4850/sumII06/The%20syntax%20of%20C%20in%20Backus-Naur%20form.htm

Signed-off-by: Masahiro Yamada <[e-mail]>
Acked-by: Nicolas Schier <[e-mail]>

scripts/genksyms/parse.y

···
 
 type_specifier:
 	simple_type_specifier
-	| cvar_qualifier
+	| type_qualifier
 	| TYPEOF_KEYW '(' parameter_declaration ')'
 	| TYPEOF_PHRASE
 
···
 	;
 
 ptr_operator:
-	'*' cvar_qualifier_seq_opt
+	'*' type_qualifier_seq_opt
 		{ $$ = $2 ? $2 : $1; }
 	;
 
-cvar_qualifier_seq_opt:
+type_qualifier_seq_opt:
 	/* empty */					{ $$ = NULL; }
-	| cvar_qualifier_seq
+	| type_qualifier_seq
 	;
 
-cvar_qualifier_seq:
-	cvar_qualifier
-	| cvar_qualifier_seq cvar_qualifier		{ $$ = $2; }
+type_qualifier_seq:
+	type_qualifier
+	| type_qualifier_seq type_qualifier		{ $$ = $2; }
 	;
 
-cvar_qualifier:
+type_qualifier:
 	CONST_KEYW | VOLATILE_KEYW | ATTRIBUTE_PHRASE
 	| RESTRICT_KEYW
 		{ /* restrict has no effect in prototypes so ignore it */