Revert "85xx: Using proper I2C source clock divider for MPC8544"

This reverts commit dffd2446fb.

The fix introduced by this patch is not correct.  The problem is
that the documentation is not correct for the MPC8544 with regards
to which bit in PORDEVSR2 is for the SEC_CFG.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

cpu/mpc85xx/speed.c

@@ -102,9 +102,9 @@ int get_clocks (void)
 	 * PORDEVSR2_SEC_CFG bit is 0 on all 85xx boards that are not an 8544.
 	 */
 	if (gur->pordevsr2 & MPC85xx_PORDEVSR2_SEC_CFG)
-		gd->i2c1_clk = sys_info.freqSystemBus / 2;
-	else
 		gd->i2c1_clk = sys_info.freqSystemBus / 3;
+	else
+		gd->i2c1_clk = sys_info.freqSystemBus / 2;
 #else
 	/* Most 85xx SOCs use CCB/2, so this is the default behavior. */
 	gd->i2c1_clk = sys_info.freqSystemBus / 2;