Hi Rick,
According to the PSID it's an IBM OEM card, so you can download the fw to it from:
http://www.mellanox.com/page/firmware_table_IBM_Intelligent_Clusters
regarding the 2nd question, no need to upgrade both entries, they actually represent the same device only a different access method to it, the mt26448_pci_cr0 device is a bit faster so you can use it