Add support for the STM32H5 ICACHE peripheral. The CortexM33 does not have typical embedded icache and dcache. Instead STM32H5 provides the ICACHE as a separate peripheral that needs to be configured. This commit adds the stm32h5 specific icache driver. This driver named functions like those in <nuttx/cache.h>. However since the CortexM33 does not have cache itself, ARCH_ICACHE is not enabled. Therefore these stm32h5 specific functions were developed.
Signed-off-by: kywwilson11 <kwilson@2g-eng.com>