net: keystone_serdes: add keystone K2E SoC support

Keystone2 Edison SoC uses the same keystone SerDes driver.
This patch adds support for K2E SoCs.

Acked-by: Vitaly Andrianov <vitalya@ti.com>
Acked-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>
diff --git a/arch/arm/include/asm/arch-keystone/hardware-k2e.h b/arch/arm/include/asm/arch-keystone/hardware-k2e.h
index fba701f..1d6fd11 100644
--- a/arch/arm/include/asm/arch-keystone/hardware-k2e.h
+++ b/arch/arm/include/asm/arch-keystone/hardware-k2e.h
@@ -41,6 +41,10 @@
 #define KS2_CIC2_DDR3_ECC_IRQ_NUM	-1	/* not defined in K2E */
 #define KS2_CIC2_DDR3_ECC_CHAN_NUM	-1	/* not defined in K2E */
 
+/* SGMII SerDes */
+#define KS2_SGMII_SERDES2_BASE		0x02324000
+#define KS2_LANES_PER_SGMII_SERDES	4
+
 /* Number of DSP cores */
 #define KS2_NUM_DSPS			1