media: atomisp: do not free kmalloc memory by vfree

fw_minibuffer[i].buffer is allocated by kmalloc in sh_css_load_blob_info
and by vmalloc in setup_binary. So use kvfree to decide which of those
allocators to use for freeing.

Also remove the useless cast.

Link: https://lore.kernel.org/linux-media/20210219101216.28406-1-jslaby@suse.czSigned-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/sh_css_firmware.c

@@ -366,7 +366,7 @@ void sh_css_unload_firmware(void)
 			if (fw_minibuffer[i].name)
 				kfree((void *)fw_minibuffer[i].name);
 			if (fw_minibuffer[i].buffer)
-				vfree((void *)fw_minibuffer[i].buffer);
+				kvfree(fw_minibuffer[i].buffer);
 		}
 		kfree(fw_minibuffer);
 		fw_minibuffer = NULL;