net: zynq_gem: Correct SGMII enable bit setting

Correct the SGMII enable bit position to 27 instead
of 31.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

drivers/net/zynq_gem.c

@@ -57,7 +57,7 @@ DECLARE_GLOBAL_DATA_PTR;
 #define ZYNQ_GEM_NWCFG_SPEED1000	0x00000400 /* 1Gbps operation */
 #define ZYNQ_GEM_NWCFG_FDEN		0x00000002 /* Full Duplex mode */
 #define ZYNQ_GEM_NWCFG_FSREM		0x00020000 /* FCS removal */
-#define ZYNQ_GEM_NWCFG_SGMII_ENBL	0x80000000 /* SGMII Enable */
+#define ZYNQ_GEM_NWCFG_SGMII_ENBL	0x08000000 /* SGMII Enable */
 #define ZYNQ_GEM_NWCFG_PCS_SEL		0x00000800 /* PCS select */
 #ifdef CONFIG_ARM64
 #define ZYNQ_GEM_NWCFG_MDCCLKDIV	0x00100000 /* Div pclk by 64, max 160MHz */