drm/malidp: Replace module initialization with DRM helpers

Replace module_platform_driver() with drm_module_platform_driver(). The
DRM macro respects drm_firmware_drivers_only() and fails if the flag has
been set.
Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20211222082831.196562-11-javierm@redhat.com

drivers/gpu/drm/arm/malidp_drv.c

@@ -25,6 +25,7 @@
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_modeset_helper.h>
+#include <drm/drm_module.h>
 #include <drm/drm_of.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_vblank.h>
@@ -1008,7 +1009,7 @@ static struct platform_driver malidp_platform_driver = {
 	},
 };
 
-module_platform_driver(malidp_platform_driver);
+drm_module_platform_driver(malidp_platform_driver);
 
 MODULE_AUTHOR("Liviu Dudau <Liviu.Dudau@arm.com>");
 MODULE_DESCRIPTION("ARM Mali DP DRM driver");