The configuration file for CVA6 needs update

@MikeOpenHWGroup I see the configuration file for CVA6 is there, but might not have been tested with further development in the repository. I have a version of file that is updated to work with CVA6. Right now I am generating code with it to run on ARA. I put it on a gist as of now, but can push through a PR if I encounter no further errors. Another thing that needs update is the update related to addressable memory. One in py/riscv/memory-cva6.py and one in py/riscv/PcConfig.py which are as following:

In memory-cva6, following function is modified:

def configure_memory(interface):
    interface.addMemoryRange(0, 0x000080000000, 0x000080100000)

And the PcConfig has following updates to satisfy the assertions in ARA:

def get_reset_pc():
    return 0x80000000


def get_initial_pc(thread_id):
    return get_base_initial_pc() + thread_id * get_initial_pc_offset()


def get_boot_pc(thread_id):
    return get_base_boot_pc() + thread_id * get_boot_pc_offset()


def get_reset_region_size():
    return 0x40


def get_boot_region_size():
    return 0x1000


def get_base_initial_pc():
    return 0x80011000


def get_base_boot_pc():
    return 0x80000024


def get_initial_pc_offset():
    return 0x1000000


def get_boot_pc_offset():
    return 0x100000

@noahsherrill can you test the given changes?