drm/i915/dmc: Change max DMC FW size on ADL-P

Increase the max size of DMC on ADL-P to account for support of new
features in the current/upcoming DMC versions.

Signed-off-by: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211207023718.322349-1-madhumitha.tolakanahalli.pradeep@intel.com