arm: Remove ti816x_evm board and ti816x SoC support

This platform is currently unmaintained and untested, so remove it.
Further, as it is the only TI816X SoC example, remove related files as
well.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/net/ti/davinci_emac.c b/drivers/net/ti/davinci_emac.c
index 29d2fc9..034877a 100644
--- a/drivers/net/ti/davinci_emac.c
+++ b/drivers/net/ti/davinci_emac.c
@@ -833,9 +833,9 @@
 #endif
 	}
 
-#if defined(CONFIG_TI816X) || (defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \
+#if defined(CONFIG_DRIVER_TI_EMAC_USE_RMII) && \
 		defined(CONFIG_MACH_DAVINCI_DA850_EVM) && \
-			!defined(CONFIG_DRIVER_TI_EMAC_RMII_NO_NEGOTIATE))
+			!defined(CONFIG_DRIVER_TI_EMAC_RMII_NO_NEGOTIATE)
 	for (i = 0; i < num_phy; i++) {
 		if (phy[i].is_phy_connected(i))
 			phy[i].auto_negotiate(i);