radeon: Fix printf format not to warn in 64bit
radeon: Fix printf format not to warn in 64bit

When I build tested radeon changes I noticed two warnings about format
size missmatch in 64bit. I decided to clean them to make relevant
compiler warnings easier to spot.

Signed-off-by: Pauli Nieminen <1553d7c37f170f05cc446e658e701b123a72a5e4@linux.intel.com>
Reviewed-by: Brian Paul <3cb4e1df5ec4da2c7c4af7c52cec8cf340a55a10@vmware.com>

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