kernel: wpan: mrf24j40 depends on regmap-spi

kmod-mrf24j40 select REGMAP_SPI since 4.3, thus add dependency to
kmod-regmap.

Found by buildbot:
Package kmod-mrf24j40 is missing dependencies for the following libraries:
regmap-spi.ko

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

SVN-Revision: 48484

package/kernel/linux/modules/wpan.mk

@@ -85,7 +85,7 @@ $(eval $(call KernelPackage,at86rf230))
 define KernelPackage/mrf24j40
   SUBMENU:=$(WPAN_MENU)
   TITLE:=MRF24J40 transceiver driver
-  DEPENDS:=+kmod-mac802154
+  DEPENDS:=+kmod-mac802154 +kmod-regmap
   KCONFIG:=CONFIG_IEEE802154_MRF24J40 \
 	CONFIG_SPI=y \
 	CONFIG_SPI_MASTER=y