drm/ast: Rename AST_IO_VGA_ENABLE_PORT to AST_IO_VGAER

Rename AST_IO_VGA_ENABLE_PORT to AST_IO_VGAER to align naming
in the driver with documentation. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231017083653.10063-4-tzimmermann@suse.de

drivers/gpu/drm/ast/ast_drv.h

@@ -261,7 +261,7 @@ static inline bool __ast_gen_is_eq(struct ast_device *ast, unsigned long gen)
 
 #define AST_IO_VGAARI_W			(0x40)
 #define AST_IO_VGAMR_W			(0x42)
-#define AST_IO_VGA_ENABLE_PORT		(0x43)
+#define AST_IO_VGAER			(0x43)
 #define AST_IO_SEQ_PORT			(0x44)
 #define AST_IO_DAC_INDEX_READ		(0x47)
 #define AST_IO_DAC_INDEX_WRITE		(0x48)

drivers/gpu/drm/ast/ast_main.c

@@ -40,7 +40,7 @@ static bool ast_is_vga_enabled(struct drm_device *dev)
 	struct ast_device *ast = to_ast_device(dev);
 	u8 ch;
 
-	ch = ast_io_read8(ast, AST_IO_VGA_ENABLE_PORT);
+	ch = ast_io_read8(ast, AST_IO_VGAER);
 
 	return !!(ch & 0x01);
 }
@@ -49,7 +49,7 @@ static void ast_enable_vga(struct drm_device *dev)
 {
 	struct ast_device *ast = to_ast_device(dev);
 
-	ast_io_write8(ast, AST_IO_VGA_ENABLE_PORT, 0x01);
+	ast_io_write8(ast, AST_IO_VGAER, 0x01);
 	ast_io_write8(ast, AST_IO_VGAMR_W, 0x01);
 }