dmaengine: img-mdc: remove incorrect of_match_ptr annotation

Building with W=1 shows a warning about of_ftpm_tee_ids being unused when
CONFIG_OF is disabled:

    drivers/dma/img-mdc-dma.c:863:34: error: unused variable 'mdc_dma_of_match' [-Werror,-Wunused-const-variable]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20250225163315.4168033-1-arnd@kernel.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>