kernel: wpan: at86rf230 depends on regmap-spi

kmod-at86rf230 select REGMAP_SPI since 3.17, so add a dependency to
kmod-regmap.

Fixes the following error:

Package kmod-at86rf230 is missing dependencies for the following libraries:
regmap-core.ko
regmap-spi.ko

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@46387 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/kernel/linux/modules/wpan.mk

@@ -71,7 +71,7 @@ $(eval $(call KernelPackage,fakelb))
 define KernelPackage/at86rf230
   SUBMENU:=$(WPAN_MENU)
   TITLE:=AT86RF230 transceiver driver
-  DEPENDS:=+kmod-mac802154
+  DEPENDS:=+kmod-mac802154 +kmod-regmap
   KCONFIG:=CONFIG_IEEE802154_AT86RF230 \
 	CONFIG_SPI=y \
 	CONFIG_SPI_MASTER=y