serial: 8250_dw: Call dw8250_quirks() conditionally

Not all the cases provide the driver data, that is represented by
an object instance of struct dw8250_platform_data. Id est the change
missed the case when the driver is instantiated via board files as
pure platform driver. Fix this by calling dw8250_quirks() conditionally.
This will require splitting dw8250_setup_dma_filter() out of dw8250_quirks().
Also make sure IRQ handler won't crash, it also requires driver data
to be present.

Fixes: bfd3d4a4 ("serial: 8250_dw: Drop unneeded NULL checks in dw8250_quirks()")
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202502121529.f7e65d49-lkp@intel.com


Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20250212115952.2312444-1-andriy.shevchenko@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>