ARM: OMAP: Fix build error for "pm.c" with CONFIG_PM_DEBUG

ARM: OMAP: Fix build error for "pm.c" with CONFIG_PM_DEBUG

  CC      arch/arm/plat-omap/clock.o
arch/arm/mach-omap2/pm.c: In function 'pm_init_serial_console':
arch/arm/mach-omap2/pm.c:188: error: expected ';' before 'break'
arch/arm/mach-omap2/pm.c:191: error: expected ';' before 'break'
arch/arm/mach-omap2/pm.c:193: error: 'PM_WKEN2' undeclared (first use in this function)
arch/arm/mach-omap2/pm.c:193: error: (Each undeclared identifier is reported only once
arch/arm/mach-omap2/pm.c:193: error: for each function it appears in.)
arch/arm/mach-omap2/pm.c:194: error: expected ';' before 'break'
make[1]: *** [arch/arm/mach-omap2/pm.o] Error 1
make: *** [arch/arm/mach-omap2] Error 2

Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>