staging: fbtft: ili9341: use macro FBTFT_REGISTER_SPI_DRIVER

Using FBTFT_REGISTER_DRIVER resolves to a NULL struct spi_device_id. This
ultimately causes a warning when the module probes. Fixes it.
Signed-off-by: Raphael Gallais-Pou <rgallaispou@gmail.com>
Link: https://lore.kernel.org/r/20230718172024.67488-1-rgallaispou@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fbtft/fb_ili9341.c

@@ -145,7 +145,7 @@ static struct fbtft_display display = {
 	},
 };
 
-FBTFT_REGISTER_DRIVER(DRVNAME, "ilitek,ili9341", &display);
+FBTFT_REGISTER_SPI_DRIVER(DRVNAME, "ilitek", "ili9341", &display);
 
 MODULE_ALIAS("spi:" DRVNAME);
 MODULE_ALIAS("platform:" DRVNAME);