[PATCH] clock_imx8mm: Add a stub for imx8mp_fec_interface_init()

[Fabio Estevam]

From: Fabio Estevam <festevam at denx.de>

When CONFIG_DWC_ETH_QOS_IMX=y and CONFIG_FEC_MXC is not selected, the
following warning is seen: 

arch/arm/mach-imx/imx8m/clock_imx8mm.c: In function 'board_interface_eth_init':
arch/arm/mach-imx/imx8m/clock_imx8mm.c:914:24: warning: implicit declaration of function 'imx8mp_fec_interface_init; did you mean 'imx8mp_eqos_interface_init'? [-Wimplicit-function-declaration]

Fix it by adding a stub for imx8mp_fec_interface_init() to handle this
case.

This follows the same approach done on imx8mp_eqos_interface_init().

Signed-off-by: Fabio Estevam <festevam at denx.de>
---
 arch/arm/mach-imx/imx8m/clock_imx8mm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm/mach-imx/imx8m/clock_imx8mm.c b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
index 986870799d36..5cf97a5ea952 100644
--- a/arch/arm/mach-imx/imx8m/clock_imx8mm.c
+++ b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
@@ -904,6 +904,13 @@ static int imx8mp_fec_interface_init(struct udevice *dev,
 
 	return 0;
 }
+#else
+static int imx8mp_fec_interface_init(struct udevice *dev,
+				     phy_interface_t interface_type,
+				     bool mx8mp)
+{
+	return 0;
+}
 #endif
 
 int board_interface_eth_init(struct udevice *dev, phy_interface_t interface_type)
-- 
2.34.1