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/Kconfig b/arch/sh/Kconfig
index d18310a..90c8c42 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -512,7 +512,8 @@
 	bool "Heartbeat LED"
 	depends on SH_MPC1211 || SH_SH03 || \
 		   SH_BIGSUR || SOLUTION_ENGINE || \
-		   SH_RTS7751R2D || SH_SH4202_MICRODEV || SH_LANDISK
+		   SH_RTS7751R2D || SH_SH4202_MICRODEV || SH_LANDISK || \
+		   SH_R7780RP
 	help
 	  Use the power-on LED on your machine as a load meter.  The exact
 	  behavior is platform-dependent, but normally the flash frequency is