soc: adi: Extract max32 flashprog section to a dedicated linker script

Extracts the max32 flashprog linker section to a dedicated linker script
that is conditionally included only when the flash driver is enabled.
This prepares max32 soc family to set SOC_LINKER_SCRIPT directly to the
common arm cortex-m linker script.

Signed-off-by: Maureen Helm <maureen.helm@analog.com>