board: ti: DRA7: Add DP83867 TI phy for rev c

Enable the TI DP83867 Giga bit phy on the
dra7 rev c board.  The rx and tx internal
delays are need for this board so the usage
of RGMII_ID is required.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

include/configs/dra7xx_evm.h

@@ -155,6 +155,7 @@
 #define CONFIG_MII			/* Required in net/eth.c */
 #define CONFIG_PHY_GIGE			/* per-board part of CPSW */
 #define CONFIG_PHYLIB
+#define CONFIG_PHY_TI
 
 /* SPI */
 #undef	CONFIG_OMAP3_SPI