linux: cmem: dra7xx: Increase CMEM region
linux: cmem: dra7xx: Increase CMEM region

* The increased size is required for OpenMP on the DSPs

Signed-off-by: Jacob Stiffler <0ec61db87821c27ca8ee6f3e24c6f93fdbb785d4@ti.com>

rcn-ee/meta-processor-sdk,rcn-ee/meta-processor-sdk,rcn-ee/meta-processor-sdk