ARM: OMAP: Fix compile for OMAP_PM_NOOP if PM is not selected

Commit 6e740f9a8 (ARM: OMAP: Move omap-pm-noop.c local to mach-omap2)
moved omap-pm-noop to be local to mach-omap2. However, the makefile
entry got placed within ifeq ($(CONFIG_PM),y) which was not the
case earlier.

Fix the issue by moving it out of the ifeq ($(CONFIG_PM),y) in
the makefile as these stubs are needed also when PM is not set.

Reported-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/Makefile

@@ -63,6 +63,8 @@ obj-$(CONFIG_ARCH_OMAP4)		+= opp4xxx_data.o
 endif
 
 # Power Management
+obj-$(CONFIG_OMAP_PM_NOOP)		+= omap-pm-noop.o
+
 ifeq ($(CONFIG_PM),y)
 obj-$(CONFIG_ARCH_OMAP2)		+= pm24xx.o sleep24xx.o
 obj-$(CONFIG_ARCH_OMAP3)		+= pm34xx.o sleep34xx.o
@@ -70,7 +72,6 @@ obj-$(CONFIG_ARCH_OMAP4)		+= pm44xx.o omap-mpuss-lowpower.o
 obj-$(CONFIG_ARCH_OMAP4)		+= sleep44xx.o
 obj-$(CONFIG_SOC_OMAP5)			+= omap-mpuss-lowpower.o sleep44xx.o
 obj-$(CONFIG_PM_DEBUG)			+= pm-debug.o
-obj-$(CONFIG_OMAP_PM_NOOP)		+= omap-pm-noop.o
 
 obj-$(CONFIG_POWER_AVS_OMAP)		+= sr_device.o
 obj-$(CONFIG_POWER_AVS_OMAP_CLASS3)	+= smartreflex-class3.o