powerpc/mpc8xxx: reword max tCKmin message

Reword "The DIMM max tCKmin is ..." to "The DDR clock is faster than the slowest
DIMM(s) can support". Fixed interger type in printf as well.
Signed-off-by: NYork Sun <yorksun@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c

@@ -38,9 +38,9 @@ compute_cas_latency_ddr3(const dimm_params_t *dimm_params,
 	}
 	/* validate if the memory clk is in the range of dimms */
 	if (mclk_ps < tCKmin_X_ps) {
-		printf("The DIMM max tCKmin is %d ps,"
-			"doesn't support the MCLK cycle %d ps\n",
-			tCKmin_X_ps, mclk_ps);
+		printf("DDR clock (MCLK cycle %u ps) is faster than "
+			"the slowest DIMM(s) (tCKmin %u ps) can support.\n",
+			mclk_ps, tCKmin_X_ps);
 		return 1;
 	}
 	/* determine the acutal cas latency */