powerpc: MPC8544DS: revert typo in I2C offset value

I2C offset was changed by commit 00f792e0 (added multibus support)
from 0x3100 to 0x3000. This typo leads to error when reading SPD
from DDR DIMMs.

Signed-off-by: Benjamin Kamath <bkamath@spaceflight.com>
Signed-off-by: York Sun <york.sun@nxp.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>

include/configs/MPC8544DS.h

@@ -209,7 +209,7 @@ extern unsigned long get_board_sys_clk(unsigned long dummy);
 #define CONFIG_SYS_I2C_FSL
 #define CONFIG_SYS_FSL_I2C_SPEED	400000
 #define CONFIG_SYS_FSL_I2C_SLAVE	0x7F
-#define CONFIG_SYS_FSL_I2C_OFFSET	0x3000
+#define CONFIG_SYS_FSL_I2C_OFFSET	0x3100
 #define CONFIG_SYS_I2C_NOPROBES		{ {0, 0x69} }
 #define CONFIG_SYS_I2C_EEPROM_ADDR	0x57