OMAP2+: powerdomain: move header file from plat-omap to mach-omap2

The OMAP powerdomain code and data is all OMAP2+-specific.  This seems
unlikely to change any time soon.  Move plat-omap/include/plat/powerdomain.h
to mach-omap2/powerdomain.h.  The primary point of doing this is to remove
the temptation for unrelated upper-layer code to access powerdomain code
and data directly.

As part of this process, remove the references to powerdomain data
from the GPIO "driver" and the OMAP PM no-op layer, both in plat-omap.
Change the DSPBridge code to point to the new location for the
powerdomain headers.  The DSPBridge code should not be including the
powerdomain headers; these should be removed.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Omar Ramirez Luna <omar.ramirez@ti.com>
Cc: Felipe Contreras <felipe.contreras@gmail.com>
Cc: Greg Kroah-Hartman <greg@kroah.com>
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 8d493b9..1f98e0b 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -29,7 +29,6 @@
 #include <mach/irqs.h>
 #include <mach/gpio.h>
 #include <asm/mach/irq.h>
-#include <plat/powerdomain.h>
 
 /*
  * OMAP1510 GPIO registers
@@ -1864,7 +1863,7 @@
 
 static int workaround_enabled;
 
-void omap2_gpio_prepare_for_idle(int power_state)
+void omap2_gpio_prepare_for_idle(int off_mode)
 {
 	int i, c = 0;
 	int min = 0;
@@ -1880,7 +1879,7 @@
 		for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++)
 			clk_disable(bank->dbck);
 
-		if (power_state > PWRDM_POWER_OFF)
+		if (!off_mode)
 			continue;
 
 		/* If going to OFF, remove triggering for all