powerpc: t1040: Correct RCW MAC2_GMII_SEL value

Per T1040RM (Rev. 1, 08/2015), the value of
FSL_CORENET_RCWSR13_MAC2_GMII_SEL_ENET_PORT is wrong
and should be 0x00000080 (bit 440 in the RCW).
Signed-off-by: NBin Meng <bmeng.cn@gmail.com>
Acked-by: NPoonam Aggrwal <poonam.aggrwal@nxp.com>
Reviewed-by: NYork Sun <york.sun@nxp.com>

arch/powerpc/include/asm/immap_85xx.h

@@ -1789,7 +1789,7 @@ typedef struct ccsr_gur {
 #define FSL_CORENET_RCWSR13_EC2_FM1_DTSEC5_MII	0x20000000
 #define FSL_CORENET_RCWSR13_MAC2_GMII_SEL	0x00000080
 #define FSL_CORENET_RCWSR13_MAC2_GMII_SEL_L2_SWITCH	0x00000000
-#define FSL_CORENET_RCWSR13_MAC2_GMII_SEL_ENET_PORT	0x80000000
+#define FSL_CORENET_RCWSR13_MAC2_GMII_SEL_ENET_PORT	0x00000080
 #define CONFIG_SYS_FSL_SCFG_PIXCLKCR_OFFSET	0x28
 #define PXCKEN_MASK	0x80000000
 #define PXCK_MASK	0x00FF0000