kernel: move kmod-i2c-bcm-iproc to I2C menu

A typo resulted in that module having it's own menu.
Move it into the I2C menu as it was most likely intended.

Fixes: 1291274335 ("kernel: package bcm53xx i2c module")
Signed-off-by: Daniel Golle <[email protected]>

target/linux/bcm53xx/modules.mk

@@ -40,7 +40,7 @@ define KernelPackage/i2c-bcm-iproc
   TITLE:=Broadcom iProc I2C controller
   KCONFIG:=CONFIG_I2C_BCM_IPROC
   DEPENDS:=@TARGET_bcm53xx +kmod-i2c-core
-  SUBMENU:=(I2C_MENU)
+  SUBMENU:=$(I2C_MENU)
   FILES:=$(LINUX_DIR)/drivers/i2c/busses/i2c-bcm-iproc.ko
   AUTOLOAD:=$(call AutoLoad,59,i2c-bcm-iproc,1)
 endef