powerpc: t1040: Correct RCW EC2 settings

Per T1040RM (Rev. 1, 08/2015), there are 2 issues with the RCW EC2
settings.

- The value of FSL_CORENET_RCWSR13_EC2_FM1_GPIO is wrong and should
  be 0x04000000 (value of 1 in RCW bit [420:421])
- Value of 2/3 are reserved in RCW bit [420:421], hence there is no
  macro FSL_CORENET_RCWSR13_EC2_FM1_DTSEC5_MII.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Poonam Aggrwal <poonam.aggrwal@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/powerpc/include/asm/immap_85xx.h

@@ -1785,8 +1785,7 @@ typedef struct ccsr_gur {
 #define FSL_CORENET_RCWSR13_EC1_FM1_DTSEC4_MII	0x20000000
 #define FSL_CORENET_RCWSR13_EC2	0x0c000000 /* bits 420..421 */
 #define FSL_CORENET_RCWSR13_EC2_FM1_DTSEC5_RGMII	0x00000000
-#define FSL_CORENET_RCWSR13_EC2_FM1_GPIO	0x10000000
-#define FSL_CORENET_RCWSR13_EC2_FM1_DTSEC5_MII	0x20000000
+#define FSL_CORENET_RCWSR13_EC2_FM1_GPIO	0x04000000
 #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	0x00000080

drivers/net/fm/t1040.c

@@ -41,9 +41,6 @@ phy_interface_t fman_port_enet_if(enum fm_port port)
 		if ((rcwsr13 & FSL_CORENET_RCWSR13_EC2) ==
 				FSL_CORENET_RCWSR13_EC2_FM1_DTSEC5_RGMII)
 			return PHY_INTERFACE_MODE_RGMII;
-		else if ((rcwsr13 & FSL_CORENET_RCWSR13_EC2) ==
-				FSL_CORENET_RCWSR13_EC2_FM1_DTSEC5_MII)
-			return PHY_INTERFACE_MODE_MII;
 	}
 
 	switch (port) {