powerpc/mpc8548cds: Remove incorrect DDR_MSYNC_IN erratum define

This erratum doesn't exist on this processor, and the workaround
spins on a non-existent register, causing boot to hang.

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

include/configs/MPC8548CDS.h

@@ -91,7 +91,6 @@ extern unsigned long get_clock_freq(void);
 #undef CONFIG_FSL_DDR_INTERACTIVE
 #define CONFIG_SPD_EEPROM		/* Use SPD EEPROM for DDR setup*/
 #define CONFIG_DDR_SPD
-#define CONFIG_SYS_FSL_ERRATUM_DDR_MSYNC_IN	/* possible DLL fix needed */
 
 #define CONFIG_ECC_INIT_VIA_DDRCONTROLLER	/* DDR controller or DMA? */
 #define CONFIG_MEM_INIT_VALUE	0xDeadBeef