sh: heartbeat consolidation for banked LEDs.

This consolidates the various board heartbeat LED implementations,
used for strobing the load average across a LED bank. Those boards
not implementing a full bank can hook in via the LED class.

We leave the compat hook in the machvec for now until those non-banked
boards are able to migrate to the drivers/leds.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/drivers/Makefile b/arch/sh/drivers/Makefile
index bf18dbf..6cb9267 100644
--- a/arch/sh/drivers/Makefile
+++ b/arch/sh/drivers/Makefile
@@ -6,3 +6,4 @@
 obj-$(CONFIG_SH_DMA)		+= dma/
 obj-$(CONFIG_SUPERHYWAY)	+= superhyway/
 obj-$(CONFIG_PUSH_SWITCH)	+= push-switch.o
+obj-$(CONFIG_HEARTBEAT)		+= heartbeat.o