New printf warnings in RTEMS build

[jphickey]

Describe the bug
A recent change re-introduced some printf type warnings on the 32-bit RTEMS build

To Reproduce
Build for RTEMS i686 target
Warnings are issued:

[ 65%] Building C object cfe-core/CMakeFiles/cfe-core.dir/src/sb/cfe_sb_api.c.o
/home/joe/code/cfecfs/github/cfe/fsw/cfe-core/src/sb/cfe_sb_api.c: In function 'CFE_SB_SubscribeFull':
/home/joe/code/cfecfs/github/cfe/fsw/cfe-core/src/sb/cfe_sb_api.c:899:9: error: format '%u' expects argument of type 'unsigned int', but argument 6 has type 'uint32' [-Werror=format=]
         (unsigned int)CFE_SB_MsgIdToValue(MsgId), Collisions);
         ^
cc1: all warnings being treated as errors

Expected behavior
Should build cleanly

System observed on:
Ubuntu 20.04 build host for i686-rtems4.11 target.

Additional context
This always happens with fixed width types, needs explicit cast when used with printf.

Reporter Info
Joseph Hickey, Vantage Systems, Inc.