Read FRU/ Write FRU operations failing due to changes in entty-manager

[Kitsok]

Hello!

After recent commit to entity-manager, the bus number passed to GetRawFru, WriteFru and ReScanBus methods changed the type from uint8_t to uint16_t.

This causes fault in intel-ipmi-oem. To fix it, uint8_t need to be changed to uint16_t in the following strings:

https://github.com/openbmc/intel-ipmi-oem/blob/master/src/storagecommands.cpp#L112 https://github.com/openbmc/intel-ipmi-oem/blob/master/src/storagecommands.cpp#L116