ARM: tegra: pm: Add tegra_cpu_do_idle() prototype

When building with W=1 this function is flagged as not having a
prototype defined. Add the prototype to avoid a build warning.

Signed-off-by: Thierry Reding <[e-mail]>

arch/arm/mach-tegra/pm.h

···
 
 void tegra_clear_cpu_in_lp2(void);
 bool tegra_set_cpu_in_lp2(void);
-
+int tegra_cpu_do_idle(void);
 void tegra_idle_lp2_last(void);
 extern void (*tegra_tear_down_cpu)(void);