generic: 5.15: add missing symbol

Found durring kirkwood refreshing.

Signed-off-by: Pawel Dembicki <[email protected]>

target/linux/generic/config-5.15

@@ -4635,6 +4635,7 @@ CONFIG_PCI_SYSCALL=y
 # CONFIG_PHY_MIXEL_MIPI_DPHY is not set
 # CONFIG_PHY_MTK_HDMI is not set
 # CONFIG_PHY_MTK_MIPI_DSI is not set
+# CONFIG_PHY_MVEBU_CP110_UTMI is not set
 # CONFIG_PHY_OCELOT_SERDES is not set
 # CONFIG_PHY_PISTACHIO_USB is not set
 # CONFIG_PHY_PXA_28NM_HSIC is not set