ltq-vmmc: mark VOICE_CPE_VMMC_PMC as broken

We do not have the needed platform support for VOICE_CPE_VMMC_PMC. The
vmmc driver will not compile with this option activated.

Signed-off-by: Hauke Mehrtens <[email protected]>

package/kernel/lantiq/ltq-vmmc/Config.in

@@ -61,6 +61,7 @@ choice
 endchoice
 
 config VOICE_CPE_VMMC_PMC
+	depends on BROKEN
 	depends on (VOICE_CPE_VMMC_WITH_DEVICE_AR9 || VOICE_CPE_VMMC_WITH_DEVICE_VR9)
 	bool "Power Management Control support"
 	default n