package/wf111: add missing comment about kernel dependency

Add a comment when kernel is not enabled (missing since the addition of
the package in commit 5b13fc05b37386e64b9f46515b57b5887ee357d9)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit b5a48f3584e39e05041666009b43075607daea24)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/wf111/Config.in

@@ -19,6 +19,10 @@ config BR2_PACKAGE_WF111
 
 	  https://www.silabs.com/wireless/wi-fi/bluegiga-legacy-modules/device.wf111
 
+comment "wf111 needs a Linux kernel to be built"
+	depends on !BR2_LINUX_KERNEL
+	depends on BR2_ARM_CPU_ARMV5 || BR2_ARM_CPU_ARMV7A || BR2_i386
+
 comment "wf111 needs a glibc toolchain"
 	depends on BR2_LINUX_KERNEL
 	depends on BR2_ARM_CPU_ARMV5 || BR2_ARM_CPU_ARMV7A || BR2_i386