remoteproc: pru: Remove always true check positive unsigned value

remoteproc: pru: Remove always true check positive unsigned value

In both cases the type of da is u32. And PRU_PDRAM_DA is 0.
So the check da >= PRU_PDRAM_DA is always true and can be removed.

Flagged by Smatch:

 drivers/remoteproc/pru_rproc.c:660 pru_d_da_to_va() warn: always true condition '(da >= 0) => (0-u32max >= 0)'
 drivers/remoteproc/pru_rproc.c:709 pru_i_da_to_va() warn: always true condition '(da >= 0) => (0-u32max >= 0)'

No functional changes intended.
Compile tested only.

Reported-by: kernel test robot <lkp@intel.com>
Link: https://www.spinics.net/lists/kernel/msg4025983.html
Signed-off-by: Simon Horman <horms@kernel.org>
Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com>
Link: https://lore.kernel.org/r/20230404-pru-always-true-v1-1-b1b55eeff188@kernel.org
[Fixed typo in changelog]
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>