scsi_disk: Disable FSTRIM.

It is known to destroy data on such devices (see #10336). But it seems to
work on ramdisk devices, so only disable it here, not for everything.

src/add-ons/kernel/drivers/disk/scsi/scsi_disk/scsi_disk.cpp

@@ -413,6 +413,7 @@ das_ioctl(void* cookie, uint32 op, void* buffer, size_t length)
 		case B_FLUSH_DRIVE_CACHE:
 			return synchronize_cache(info);
 
+#if 0
 		case B_TRIM_DEVICE:
 		{
 			fs_trim_data* trimData;
@@ -428,6 +429,7 @@ das_ioctl(void* cookie, uint32 op, void* buffer, size_t length)
 
 			return copy_trim_data_to_user(buffer, trimData);
 		}
+#endif
 
 		default:
 			return sSCSIPeripheral->ioctl(handle->scsi_periph_handle, op,