ARM: CSR: PM: use outer_resume to resume L2 cache

now we move l2x0 resume to Linux from bootloader since l2x0 already has
resume support in core.
Signed-off-by: Barry Song <Baohua.Song@csr.com>

arch/arm/mach-prima2/pm.c

@@ -71,6 +71,7 @@ static int sirfsoc_pm_enter(suspend_state_t state)
 		outer_disable();
 		/* go zzz */
 		cpu_suspend(0, sirfsoc_finish_suspend);
+		outer_resume();
 		break;
 	default:
 		return -EINVAL;