drivers: video: dcmi: fix DMA channel configuration

Commit 64149e4d added an "#if defined()"
for configuring DMA channels differently depending on SOC family of the
STM32 HAL, but did not include the STM32H7 family in the same group as
STM32F7. Fix it by adding the STM32H7 in the same #ifdef filter.

Fixes #92015

Signed-off-by: Josuah Demangeon <me@josuah.net>