global: Migrate CONFIG_SH_ETHER_PHY_ADDR to CFG

Perform a simple rename of CONFIG_SH_ETHER_PHY_ADDR to CFG_SH_ETHER_PHY_ADDR

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/README b/README
index 5f688d7..217fbaf 100644
--- a/README
+++ b/README
@@ -544,7 +544,7 @@
 			CONFIG_SH_ETHER_USE_PORT
 			Define the number of ports to be used
 
-			CONFIG_SH_ETHER_PHY_ADDR
+			CFG_SH_ETHER_PHY_ADDR
 			Define the ETH PHY's address
 
 			CFG_SH_ETHER_CACHE_WRITEBACK