kernel: fix dependency chain of kmod-igb

The igb kmods selects kmod-i2c-algo-bit which in turn is invisible until
kmod-i2c-core gets selected, causing kmod-igb to be hidden from menuconfig
as well.

Let kmod-igb select kmod-i2c-core as well in order to make it visible
in menuconfig right away.

Signed-off-by: Jo-Philipp Wich <[email protected]>

package/kernel/linux/modules/netdevices.mk

@@ -509,7 +509,7 @@ $(eval $(call KernelPackage,e1000e))
 define KernelPackage/igb
   SUBMENU:=$(NETWORK_DEVICES_MENU)
   TITLE:=Intel(R) 82575/82576 PCI-Express Gigabit Ethernet support
-  DEPENDS:=@PCI_SUPPORT +kmod-i2c-algo-bit +kmod-ptp
+  DEPENDS:=@PCI_SUPPORT +kmod-i2c-core +kmod-i2c-algo-bit +kmod-ptp
   KCONFIG:=CONFIG_IGB \
     CONFIG_IGB_HWMON=n \
     CONFIG_IGB_DCA=n