[PATCH] gcc-3.5: acpi build fix

Current gcc requires that both the declaration and the definition of
functions describe the same register conventions.

include/acpi/acpixf.h

@@ -450,7 +450,7 @@ acpi_status asmlinkage
 acpi_enter_sleep_state (
 	u8                              sleep_state);
 
-acpi_status
+acpi_status asmlinkage
 acpi_enter_sleep_state_s4bios (
 	void);