net/bnxt: add SRAM manager shared session

net/bnxt: add SRAM manager shared session

Fix shared session support issues due to SRAM manager
additions. Shared session does not support slices within
RM blocks. Calculate resources required without slices
and determine base addresses using old methods for the
shared session.

Signed-off-by: Farah Smith <farah.smith@broadcom.com>
Reviewed-by: Kishore Padmanabha <kishore.padmanabha@broadcom.com>
Reviewed-by: Shahaji Bhosle <sbhosle@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>