[c-nsp] Configuration register 0x2 sanity check

[John Neiberger]

We're upgrading several 4948 and 4948-10GEs and we noticed some
weirdness. Sometimes the switch would load to the old IOS even though
we had the correct boot command. We ran into an unrelated issue that
forced me to open a TAC case. The engineer said that on all Cat 4K
devices, we should be using 0x2 as the configuration register. I told
her that I normally used 0x2102, but she said not to use that on these
switches, that 0x2 was the recommended setting on all 4K platforms.

Does that sound right to you all? It seemed overly general to me, but
apparently this boot issue is a known problem and using a setting of
0x2 is a reliable workaround.

Any thoughts?