Move PHYLIB to Kconfig

Signed-off-by: Alexandru Gagniuc <alex.g@adaptrum.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/socrates_defconfig b/configs/socrates_defconfig
index 4c55b8f..d5294f3 100644
--- a/configs/socrates_defconfig
+++ b/configs/socrates_defconfig
@@ -27,6 +27,7 @@
 # CONFIG_CMD_IRQ is not set
 # CONFIG_MMC is not set
 CONFIG_MTD_NOR_FLASH=y
+CONFIG_PHYLIB=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 # CONFIG_USB_EHCI_HCD is not set