ARM: bcm2835: Enable CONFIG_PM.

The power domain driver we've enabled doesn't actually do anything
without it, and we need it to do its job for VC4 to initialize
successfully.
Signed-off-by: Eric Anholt <eric@anholt.net>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>

arch/arm/configs/bcm2835_defconfig

@@ -38,6 +38,7 @@ CONFIG_CRASH_DUMP=y
 CONFIG_VFP=y
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 # CONFIG_SUSPEND is not set
+CONFIG_PM=y
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y