Fix the checkpatch.pl issue:

./drivers/edac/ppc4xx_edac.c:199: WARNING: Prefer 'unsigned int' to bare 
use of 'unsigned'
./drivers/edac/ppc4xx_edac.c:200: WARNING: Prefer 'unsigned int' to bare 
use of 'unsigned'

Signed-off-by: maqimei <2433033762@qq.com>
---
  drivers/edac/ppc4xx_edac.c | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/edac/ppc4xx_edac.c b/drivers/edac/ppc4xx_edac.c
index 046969b..16dd9ff 100644
--- a/drivers/edac/ppc4xx_edac.c
+++ b/drivers/edac/ppc4xx_edac.c
@@ -196,8 +196,8 @@ struct ppc4xx_ecc_status {
   * TODO: The row and channel parameters likely need to be dynamically
   * set based on the aforementioned variant controller realizations.
   */
-static const unsigned ppc4xx_edac_nr_csrows = 2;
-static const unsigned ppc4xx_edac_nr_chans = 1;
+static const unsigned int  ppc4xx_edac_nr_csrows = 2;
+static const unsigned int  ppc4xx_edac_nr_chans = 1;

  /*
   * Strings associated with PLB master IDs capable of being posted in