drivers/net/phy: Add CORTINA_NO_FW_UPLOAD to Kconfig

Move CORTINA_NO_FW_UPLOAD to Kconfig file so that it can
be controlled via defconfig files.

Signed-off-by: Meenakshi Aggarwal <meenakshi.aggarwal@nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/configs/lx2160ardb_tfa_defconfig b/configs/lx2160ardb_tfa_defconfig
index a82f14e..52ac126 100644
--- a/configs/lx2160ardb_tfa_defconfig
+++ b/configs/lx2160ardb_tfa_defconfig
@@ -61,6 +61,7 @@
 CONFIG_PHY_AQUANTIA=y
 CONFIG_PHY_ATHEROS=y
 CONFIG_PHY_CORTINA=y
+CONFIG_SYS_CORTINA_NO_FW_UPLOAD=y
 CONFIG_DM_ETH=y
 CONFIG_DM_MDIO=y
 CONFIG_E1000=y