net: phy: Replace PHY_ANEG_TIMEOUT with Kconfig symbol

Switch PHY_ANEG_TIMEOUT to CONFIG_PHY_ANEG_TIMEOUT Kconfig symbol.
This removes one more configuration headers option finalizes its
Kconfig symbol conversion. No functional change expected.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/configs/am43xx_evm_qspiboot_defconfig b/configs/am43xx_evm_qspiboot_defconfig
index ea5b69f..89e2125 100644
--- a/configs/am43xx_evm_qspiboot_defconfig
+++ b/configs/am43xx_evm_qspiboot_defconfig
@@ -50,6 +50,7 @@
 CONFIG_SPL_SYS_I2C_LEGACY=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_SPI_FLASH_MACRONIX=y
+CONFIG_PHY_ANEG_TIMEOUT=8000
 CONFIG_MII=y
 CONFIG_DRIVER_TI_CPSW=y
 CONFIG_POWER_TPS65218=y