rtsx_pci_ms_drv_remove() is only called after rtsx_pci_ms_drv_probe()
completed successfully. In this case platform_set_drvdata() was called
with a non-NULL argument and so platform_get_drvdata() won't return
NULL.

Simplify by removing the if block with the always false condition.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/dd0d06ca9388fd8f6a3a8bb57354baaeaf56800a.1712757795.git.u.kleine-koenig@pengutronix.deSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>